Stronglifts is a great program and the lifts in it are the basis for gaining strength and size. The 5x5 on deadlifts and squats soon start to get tough when the weight increases. I'd recommend Wendler 531 instead, I made much better progress with that.
https://jimwendler.com/blogs/jimwendler-com/101065094-5-3-1-...
There are some apps that calculate weights for you and show you what you need to do each session, I use https://play.google.com/store/apps/details?id=com.vandersw.w...