I say if you plan to stick around and have patience to cultivate your community: do it.

If you don’t, then please don’t create them. You could join and post in existing communities that are close to those topics instead.

You are of course free to do as you will, but the reason I say don’t go for it if you don’t have the patience is because dead and unmoderated communities cause more issues than they solve.

Additionally: if you are new it’s possible some of the communities you are looking for already exist. Searching in lemmyverse.net might give you better results in case you are on a small instance.