Look at all of these responses- It would encourage me to jump in and flick everyone off.

That being said- Start with the easy stuff; Sonos, hang and bangs, pre-wires, find a good electrician and offer your services. Help family and friends with small stuff until you feel like you should be charging and then never help them again.

Take as many industry related trainings and look for an old pro who needs help finishing up jobs.

Develop an esthetic and work towards what you want to do.

As others have said learn how to install a network, standards for running wires, how to hang a TV in different situations, voltage signaling.

Keep pestering the guys on this board and don't give up.