You’re better off using a weather balloon, sure it won’t go to space proper, but it’s orders of magnitude cheaper and you can get good footage of the curvature of the Earth.
Try Google. I know a guy who was able to fly a homemade manned spacecraft all the way to Mars by simply googling "how to fly to mars". However, keep in mind that the internet is filled with misinformation and propaganda saying the earth is round so you will of course have to sift through the garbage to find your answer.
Jogaila2 t1_it07pq3 wrote
You want to go in any direction of a mental hospital. /s