All pretty good advice here! Just wanted to add that slow and steady unironically wins the race with this stuff. Radical changes are less likely to stick compared to slow, incremental change.

I started with Stronglifts 5x5 myself as well and it's a very uncomplicated program. I now do Push Pull Legs focusing on hypertrophy but what I've learned is that a program that you can stick to is the best one. It's easy to get lost in the sauce regarding optimising programs when really, going as much as you can and listening to your body will deliver changes.

One last thing - the lifting is important but sleep and nutrition is as well. The gym triggers responses in the body to build muscle and a lot of the actual physiological activity for muscle growth occurs while you sleep.

Good luck and good on you for wanting to get into it! You got this