I too would not go for circumcision until you have tried stretching over an extended period of months. I was around 15 when I realised that I could not expose the glans / head of the penis, unlike my brother who could. I decided to set-about stretching the foreskin to see if I could start to expose more and more of the glans - this took some months before I recognised I could actually expose more of the head. It probably took me around 2 years to be able to stretch the foreskin so that I could expose MOST of the glans. Then, via masturbation and stretching the skin further down towards the body, bit, by bit, over the next 3 decades - I was able to reveal the entire head of the penis!
To try stretching with the help of a steroid cream [I use clobetasol 0.05%]: don't just apply it, you need to learn how to fully work it in to the skin to get any benefit. AND ONLY EVER apply it to the foreskin area and to whatever part of the head of the penis that you can expose! Keep the steroid cream away from your main skin area / shaft surface of your penis. If you have applied and do what I suggest below ensure you have removed / scrubbed off the steroidal cream from you fingertips!
ESSENTIALLY, you need to learn how to be 'skin kindly' to the entire skin on your penis. Think more of a gentle massage action, rather than anything that resembles masturbation. Slow, deliberate movement is best. Learn how NOT to get to the point of erection, but, be partly erect, rather than fully, or even completely flaccid.
Try first (very gently) with the penis slightly pointing downward away from the body (I find the edge of the bed / top of the stairs is the best place to do this) drawing the foreskin forward from the glans as much as you can and relax the skin back. Doing this after you have had a shower is a really good time to do this.
Find the massage action that works for you. I would not recommend using oil based lubes, baby oil / gel, or popular hand, skin or body lotions as this can build up over an extended period of time to be a severe dermatological reaction. I use "Aloha" that you get from "Savers" shops - it is marketed as a after sun gel and it has no adverse reaction on my skin (again, I would not use this on the head of my penis anyway, only the main part of the skin of the shaft of the penis). YOU can do this on your own, or eventually build this into the foreplay part, or afterwards of your sexual practices with your partner.
The ideal exercise routine to build would be: shower (I also find I can do this when getting out of bed as the penis is naturally warm at the time) and fully dry the penis. Use a water based lube (eventually you will learn how to do this completely dry [without any lube]) and give your penis a relaxing massage. Again, very gently, stretch the foreskin forward from the head of the penis, as far as it will comfortably go. How far you can initially do this is dependant on the amount of loose, foreskin, that your penis actually has. After a period of weeks (certainly not just a matter of 8 or 10 days) you will find that when you are able to relax into the routine that works best for your penis, that your foreskin will react in a more positive manner to being stretched.
DO NOT become eager to try exposing more of the head of your penis for a few months - yes, you can initially gently, in the extreme, try pulling the skin back towards the body - but, don't expect too much. AND certainly, do NOT try vigorous masturbation and stretching towards the body to see what happens as it is ALL too easy to tear your foreskin!!!
Gently does it, rather than over-eager experimentation is the way to go. Whatever you do you need to try something that up till now that you haven't been doing during your adult life. In terms of your sex life, by doing what I suggest, things on that front should start to improve too! If they don't you can ask your GP whether they can refer you for some basic sex therapy - do not neglect this part of your life as this is essentially for your overall wellbeing. If you live in the UK, relationship organisations such as "Relate" have a sex therapy service and you only need to pay what you can afford (usually). If you live in another country, try searching on the internet for relationship services near to where you live.
Good Luck with whatever you do ... but essentially, do something different to what you have so far in life ...