One important aspect getting passed up here is that fact that this is a trade, and is considered in most stated to be a "trade". That is why in most states you need a contractors license. A contractors license has nothing to do with "Unions". States set up these licenses to protect many parties. The primary, subcontractors and consumers built into that are remedies to, fast ones to recoup losses.
I'm not going to go into great detail of the why's (but it is VERY important), but I'd rather be in my crappy socialist state of California to be any one of those three parties I named than in any other, should something go wrong. I would be protected from the other parties as well as a disaster and recoup rather quickly should one falter. That won't happen where there is no contractors licensing laws.
Last I looked this Trade is still a trade and it requires you learn from someone or company by working for another and spending the required years to float on your own. This whole discussion is sort of like the Sign-A-Rama who wants to be a full service electrical sign and lighting shop. I get wanting to learn, grow and expand, but it shouldn't happen over a message board or asking a neighbor. It's one thing to ask about components, vinyl film, or what Transformer might work better than others, but for never ever installed a set of channel letters before and first time seeing a electrical wiring diagram well.....
If a local established shop was asking me such a question I would shun them too, it's kinda of like the water heater guy who wants advice on framing a house of building. It 's nice they want to learn, I respect someone who wants to learn more and the proper way but go through the right avenues of the trade. Go work for someone who perform that kinda work. You'll learn the right way, a better way rather than on the job as you go. I started out sweeping the floor and getting/handing tools to the installers, observed what the crane guys were doing.
When you learn the right way you will learn the "why", that's very important for you and for your clients. It's a vague term, the "why", but you will know why something went out, or why it failed, NOT just that it needs to be replaced, because you will be replacing it again if you won't know "why", and you'll end up costing yourself money and worse of all the consumer who put their confidence and investment in you because they believed in you.