Some kits are easier than others to build. The Sig SE falls into the "Easier" category. If you are going to want to try your hand at building, this is an excellent kit to start with. If you get an ARF now, and decide to build next time, the next kit you choose may not be as easy. However, if you get the kit now, you will learn building skills and techniques that will help you get through the tougher ones later.

I would say this is DEFINITELY an excellent time to build your first kit!