Android tutorial and Cloud Storage Suggestion

Hello. My goal is to replace my secure folder on my android with a cloud solution and encrypt before upload.

Ideally i could upload and download via my android mobile and my windows pc.

My first thought was mega but i understand cryptomator wont work woth mega on mobile.

My question is, what cloud provider should i use then and how do i set up cryptomator? I do not want to use google, dropbox or azure or s3.