When to start long toss in the Offseason

hey guys whats up. Sorry for all the posts and stuff but i have been getting valuable information.

Question: How long should i take as a break before i start long tossing in the offseason. I do not have 330ft to work with either. I have a 16ft by 16ft room that i can use. But ya i heard that all you need is a net and you can adjust the angle at what you are throwing to simulate long toss.

Does this really work and if so what angle or how high should i throw into the nextl,etc more information on this would be awesome.