If you are a student or you have an organizational email with .edu at the end, most likely you could be part of an organization with possible free Canva Premium (if your organization avails it) or get a discount since it is for people in the academic field, whether you're a student or a faculty member.
Most templates are great already for different kinds of stuff. You just have to look at what's best for you.
I understand you're talking about Canva Premium right now - which is the paid version?
I don't need this for professional projects. I just wanted to create a nice thread on Bitcointalk to promote my project. It's not a big deal, so it would be enough for me to use the basic - free version. However, it turned out that even with this I have problems, it takes me a lot of time and effects of my work are not really nice. I decided to ask someone who has experience in it. I am already in touch with one designer.
But thank you for the hint, maybe it will come in handy one day