Its a bit fluffy and open to interpretation of the rules of SE so I'll answer but reserve the right to suggest this may be off-topic as its highly personal. We also have very similar numbers but slightly different priority on goals because I only care about strength, perfecting Olympic lifts and conditioning.
You have pretty solid powerlifting goals and its clear your lower-half is much stronger than your upper body. Maintaining a slow-bulk should allow you to meet your stretch goals.
5x5 Stronglifts is good for those who don't squat and have tiny legs, I don't recommend it. You have a good base so I'd recommend you either change over to any of the following linear programes:
- Greyskull LP - A simple beginner's linear progression program. Phrak's variant is a commonly used implementation. A 3 day or A/B routine
- GZCLP - A linear progression template using powerlifter Cody LeFever's GZCL Method. 3 and 4 Day spreadsheets can be found here.
- 5/3/1 For Beginners - Jim Wendler's 5/3/1 program with some simple modifications to cater it more towards novice lifters. A 3 day routine.
Olympic Lifting: Get a coach. Trying to learn anything apart from power cleans by yourself it is so much slower, difficult, dangerous and can lead to poor technique in the long run. Olympic lifting gyms cost the same as regular ones and usually chuck in coaching for a little more. They won't give you programming but can definitely help. Maybe heck out a local crossfit gym as they often do Oly Lifting classes. Alternatively, find someone in your gym who does do the oly lifts and befriend them. You can workout together and help each other, not prefect, but cheaper. Oly lifting is super fun and challenging but I sincerely recommend you don't try to develop it alone.
Bodybuilding: Once you have hit your strength goals you should change programmes to a bodybuilding split. The focus on these is less about macro and meso cycles, 1RM's and meticulous planning and more about isolation and volume. This is when you put in your extra exercises on the spreadsheet.
Good Bodybuilding Programmes include:
Footnote: Don't forget Abs! Get a Ab-roller, do hanging leg raises and weighted planks.