I want to play a jungler, but main 2 other roles

I know that you don't only have to learn 2 roles, and you can learn them all. But I like sticking to 2 roles, and don't want to have to pick between 3 roles. I main mid, champions , and as a secondary. Veigar is mastery 6, ekko none (aka above 4) I secondary Top with mastery 5, , and Mastery 5 For jungle (other roles) I have Bot none that im comfortable with and for support just . Now I want to learn shaco jungle cause he actually seems FUN. And that's what games are about (for most) but I still like sticking to 2 roles. I want to main , but at the same time I want to main , since I got mastery 6 and hes fun. Not sure if trying to main a new role is worth it or not