It is like making croissant by hand. Do it once so that you can say you've done it but then buy one after that. Technically nothing is really difficult but there are three big parts and you need some space. I make one very year because now I enjoy it. The first few years it wasn't so much enjoyment as it was a challenge to myself.
You need a moist cake to keep it from cracking. I also don't let mine sit too long. Just long enough to cool so the filling won't melt. When making the cake I use a jelly roll half sheet pan so that I didn't make it too thick.
Don't put in too much filling or ganache ... on the other hand you need enough. It is a fine line. When you roll it, you want the roll to be tight.
Watch some YouTube videos. I like Sally's Baking Addiction best followed by Delish. (I don't like how the Delish one looks - way too much filling for me - but June does a great job explaining).
Sally's Baking Addiction:
https://www.youtube.com/watch?v=I9aiA-LLzuA
Delish:
https://www.youtube.com/watch?v=K2R3uFFDLLI