Change Window 10 mail to ThunderBird

I really like windows 10 but have been very disappointed in the e-mail program, I get allot of spam and over half of my e-mail just don't get received the other half become drafts,  I cannot save business items to folders and be able to view them later...all in all confusing to use and not very user friendly. I am switching to Mozilla thunderbird because it is most like the old windows e-mail program that I really liked. so I need to know how to make that my primary e-mail program. i.e get rid of windows 10 mail.