I have Start10 to keep myself sane, but I also tried to use default Start Menu and pin tiles for programs I use. I found it to be very limiting! There is some kind of tile customizer? All I can do so far is create tile sections and pin tiles there. Can I manually resize tiles? Can I make the menu bigger so I don't have to scroll down if I pin too many tiles? Anything?!
No, that just answers your 2 questions. You can drag tiles to change their position or organize them in groups. Settings > Personalization > Start Menu also offers some options.