I've been a sufferer for over 20 years, am in the same age group as you, and didn't even consider age to be a factor in whether i could improve or beat my paruresis, i just got on with trying and practising. I can tell you that men of all different ages attend the workshop for help as there were men in their 20's, 30's, 40's, 50's, and 60's at the one's i went to.
As discussing this problem is new to you i can suggest you read all the posts on this message board. You don't have to read them all in one go but can make notes as to what you read last so you can continue where you left off.
You may find specific posts particularly helpful and you could copy and paste them into an email and send it to yourself to save them in a safe place and go back to them anytime for reference. Alternatively, you can note down the name and date of the post in a diary then go on the message board anytime and find them.
You will be signed up to receive emails of new messages on the board so won't miss out on what's going on here.
Nice to hear from you again :-)