Hallo mevrouw,
Alles goed?
Mainstream or not, I am using Coinbase since I started using crypto ( May 2017 ) and it's okay. I especially like Coinbase earn.
My favorite wallet though is Exodus and - in all honesty - if Coinbase wasn't the only exchange connected to my bank account ( and the only way for me to trade crypto to fiat ) I would probably stop using it.
See you around!