So my thinking is that the gospel should not be one of the items on our "interest" lists. I have and have had many interests, many of which have come and gone (and come back and gone again) over time. The gospel is something that should permeate everything in our life. It's not something you do for a certain period of time during certain days - it's something you live in, all day everyday.
Maybe an analogy would help. I consider myself a patriotic American (perhaps you could relate if you're a patriotic Swiss or European). This isn't something that's an interest item that happens on Thursday night from 1600-1700. It's just part of who I am. In the same way, living the gospel is living life as a citizen of the Kingdom of God. It's finding our entire identity in the Messiah and living under his rulership in his kingdom. It should be central to our identity, not a somewhat central item on our list of hobbies/things-we-do.
If you have some interests that you're passionate about, whatever they are, do them as a member of the Kingdom of God. You don't have to read the bible cover-to-cover for certain lengths of time during the week to live the gospel. You don't have to pray for any particular length of time to live the gospel. The Kingdom of God is loving God, loving your neighbor, forgiveness, charity, etc.. These are things that are done all the time in everything we do.