Thank you both for the replies, it does mean a great deal to me.
My concern with the 531 programs is that they are low rep and high weight which would be more geared towards strength rather than aesthetics. That is my biggest concern with SS too[/quote]
Do the 5/3/1 BBB 3-Month Challenge. If your focus is size and aesthetics then you can keep the intensity down for the heavy work and save your energy to do the higher volume assistance work. I guarantee you will see change if you eat and rest accordingly. It was hard for you to see progress with Starting Strength because the volume was low. You need to increase it but that also means you can’t just run yourself down to the ground with volume. Quality volume is like potential for strength/size gains but you need the recovery to match it in order to make progress. You can even go backwards if you don’t prioritize recovery. A gradual increase in volume over time is needed to continually adapt to stress and you definitely don’t need to make major increases when making progress. Run that exactly as specified before figuring out what accessory work you need to bring up certain parts of your body.
On another note, don’t think of training as either specifically for strength or specifically for size. There is always a balance. Powerlifters train for strength but they still have to grow new muscle fibers before training those fibers for maximal strength. Bodybuilders train for size but they can increase their overall volume work if they’re stronger. When you’re starting off, don’t lean all the way towards one end of the spectrum because you need to build the foundation with a balance of both. It would make sense to do the extreme if you were in the highest level of competition, probably world stage, and trying to squeeze out the last bit of performance or putting on the finishing touches of physique but it’s extremely rare to fully reach human potential.
Edit: If you eat right and have recovery in check, you can put on muscle while losing fat since the volume is demanding. Just do it and learn how your body reacts to this type of program so you can tailor it to your needs later on. You won’t regret it.