If you don’t want to watch a video, I think I can help!
If you want the electronics (EXEPT the radio and receiver and battery), you could get the power pack. The one for the triplane is power pack A I think. If you get the battery that’s recommended for that plane, you should be fine. As for a radio, there is a whole lot to choose from. I would recommend a programable radio that you can grow into. For a inexpensive budget radio, I would recommend the FlySky FS-i6X radio.
https://www.amazon.com/dp/B07Z8VCB45/?tag=lstir-20
It comes with the receiver and is programmable, meaning that you can change settings with the screen. It can also store 20 receivers/planes at a time.
If you want a bit better of a radio, you can get a spektrum or another brand. I use spektrum, just because how easy and reliable they are to use. If you want a programmable one, I would recommend the DX6E.
https://www.horizonhobby.com/product/dx6e-6-channel-dsmx-transmitter-only/SPMR6655.html
It is better quality than the fly sky and can 250 models. If you don’t want a programmable radio, you can get something like the dxs.
I hope this helps at least with the radio part of it! Like mentioned before just watch videos. It will help so much.
You could also try and find a local flying field just to talk to a real person and some guy on a video blabbing. Lol!
You can download a simulator on your computer to try and get the hang of flying before you try it in real life.
I hope you’ll like this crazy hobby and get the hang of it!