I'm in the same boat with you. I'm 48 and had shoulder surgery in May and have lost a lot of mass and strength just from not being able to go the gym for 3 months. Started back regular in September and just started a cycle today.

Mine is a bit different that yours but just like you not looking to get huge but to get lean mass gains and strength back.

My is planned like this:
Week 1-12 Test / EQ blend 200/150mg/week
Week 2-10 Tren A / Mast P 75/100 (300/400mg/Week) Probably will up the Tren to 400mg/week to get a 2:1 ratio to the Test. Will see how sides are first.

PCT basically the same as yours
DHEA supplements
TUDCA for liver as well

I got really nice gains back in 2015 off a cycle like this one, hope to get back to where I was then.

Also have some Winny that I might use at the very end of cycle but not for sure yet.

Hope you get good results off yours as well, getting older sucks! Looking forward to having some extra energy for a while.