When drawing on paper, it can make a huge difference whether you use a suitable paper or not. There are a few very simple tips:
For watercolours, it is best to use slightly thicker paper. Whether it's more like 120 g/m2 or 200g/m2 or even firmer is based on personal preference. There are rougher and smoother papers. I sometimes use one or the other.
For handlettering projects with brush pens and felt pens, I would choose a rather smooth-coated paper because the felt tips break more quickly when you write with them on rough paper. The paper should not be too fibrous so that the felt tip pen does not run.
I usually use paper from Hahnemühle or Canson. My sketchbooks are mainly from Moleskine.
Sketchbooks are a great way to keep drawings already bound. You don't have to file sheets. It can be especially helpful when you're going through a creativity block and you can look through old sketchbooks to see how you've developed and realise that maybe you're not as bad as you think you are.
I hope this has helped you a little.
Be inspired and blessed!