Welcome Tom. I started on the Momo as well (still have it in the garage actually) and Its a nice wheel, little small but it works.
Hopefully you can find a nice wood cockpit to build. I have plans for mine below if you click the link in my signature.
You can look at those and see if the design is something you'd be interested in.
I built my rig for really cheap, so you don't need to spend a lot of money to have fun and the realisim.
Some of my favorite sims are Assetto Corsa and Euro Truck Sim 2. You might want to check out those and Pcars along with Iracing.