Should you do what you don't love?

You should be intentional with what you do.

The question is whether what you don't like is beneficial for you. If yes, then focus on self-discipline rather than looking for motivation.

Then you should be working out a plan.
Can you make it more enjoyable with time with some simple tweaks?

Or can you find something better you like, want to do and is beneficial for you.

So overall:
1. Be intentional
2. Take action
3. Work out a plan
4. Find a way to love what you do or do what you love.
5. Focus on discipline rather than motivation