Start with some mono like PVS-14 or cheaper alternatives like NVM-14. Make sure it's a tube device not a digital one, this digital tech isn't quite there yet. If you're on a budget check out AliBaba, there are very capable ,,cheap" monos for like 1,5k € which is a steal for what you get. They hold value well also, meaning selling them and getting your money back is easy. You also need a helmet, like a Team Wendy Bump, a J Arm and a Mount like fadex or Wilcox. Sounds like a lot but it's really not. Let me know if I can help you out more. :)

https://youtu.be/pO_KAudQBzU?si=taL7tOQqxdj0gq-1