My first experience with VR was Mission: ISS then VR Rollercoaster, needless to say it was terrible, dizzy for a day or 2. Read up on how to get your VR legs and practiced for a week. Now I can go on till I'm tired, most time I played was 6+ hours all on DCS.
I would also suggest getting the G2 specially with the new cable, its better now with regards to stability. Its cheaper but punches above its price. Its also the king of clarity only losing to the Varjo headsets which are really expensive. You will want the best clarity for sims as you will need to read dials, gauges, digital stuff, etc. The Pimax also is a very good choice, clarity is close to the G2. Fov is massive, far beyond the G2 but is also expensive.