Questions & Answers about Jeg vil gjøre det selv.
In this sentence, vil usually means want to.
So Jeg vil gjøre det selv is most naturally understood as I want to do it myself.
Norwegian vil can sometimes look like English will, but it often expresses desire or intention, not just future tense. Context decides the best translation.
- Jeg vil spise = I want to eat
- Det vil regne i morgen = It will rain tomorrow
So in your sentence, vil is best understood as want to.