I’d imagine it’s fairly different for each person; some hard, others no big deal!
If I remember my experience of using a tablet for the very first time at all, it was… new! Wasn’t exactly ‘hard’ to learn how to use, but it certainly did take some time to adjust to! Don’t worry to much if you find yourself with one! It could take some time to adjust to it! But before you know it, it’ll be like using an actual pen on paper!