It does get better honestly, and well done for getting started.
Re the padded shorts, don't wear anything else underneath them, and also be careful what you put over the top. Thick seams like those on jeans can still rub even through the padding.
My first bike - a "comfort bike" came with a womens specific comfort saddle, and I honestly should have complained, it was agony. It did take a few rides to work out that it was the saddle that was the problem and not my lack of experience. Nurofen or arnica tablets after a ride were very helpful.