No it isn't, except in a very technical sense. You do need to do uranium enrichment and put the uranium into fuel cores, but you won't need to deal with the tricky stuff, namely keeping things cool and running in a reactor that generates power. In my fusion reactor project, I never built a real fission reactor, just a tritium breeder, which is a reactor only in a very technical sense.
Here's what I did instead.
Also this is temporary. Once you've built enough fusion fuel to start up your fusion reactor, the fusion reactor can be made to generate its own tritium at an absolutely negligible loss of power. You'll find how to do that further down in the linked thread.
Having said that, a fusion reactor is a huge, huge project. Not mainly because of the resources - though that also is a factor, but the amount of production processes you need to make the components, and most of all the supporting infrastructre required. For instance, you can start thinking about how to make a canola farm that puts out 4 buckets of lubricant per second (!) to run the turbines. I've been joking about how the fusion reactor runs on lubricant, not on fusion plasma, since you'll need about 20 times more lubricant to run the turbines than you need tritium and deuterium to run the tokamak.
