When I started way back in 1983 after getting out of the Army, and moving back to Long Island NY I bought a portable and a 175 with solution tank and carpet brush, and just jumped in knowing nothing
bought a few different chems and all my friends and family were used as guinea pigs. This allowed me to get comfortable and confident in what i was doing.
Then i started to charge people. I was a hard worker, had a great personality and people liked me and the job i did
Word of mouth took off and there was no looking back, I did very well
No advertising at all, just business cards, There was no internet or social media or anything even close to what is available nowadays.
After 5 years of this in NY i sold my customers, kept my equipment and moved to San Diego CA where i restarted by going to work for one of those 9.95 per room bait and switch companies
Although i didn't know going in that they were bait and switch and had never even heard of that scam before.
Well i couldn't do this to people, it was and still is just wrong.
So when i went into peoples home's, before i did anything i explained to them what was expected of me by the company and expressed how i did not agree with their method, i then would negotiate with them a fair price to which they would agree, i'd clean there carpet, do a good job and give them my personal phone number.
Did this for two months and before i started getting calls because i was getting recommended to the friends and family of these people i already cleaned for.
I said bye bye to the bait and switch people and was off and running on my own again, and again did very well for myself.
Still no advertising at all other then business cards
If your a hard worker, have a good personality and are good with people and of course you have to do a good job, you'd be surprised how far just word of mouth can get you.
Now add to that the power of the internet and social media and go make some $$$$
Don't get greedy either