Just make sure that whatever you offer, you are able to do well otherwise is will be a negative for you.
I happen to have painted all my life, so I had professional grade Graco airless sprayer, masking machine, brushes, rollers, extensions, etc. Basically everything to be a professional painter. I have painted countless houses, rooms, restaurant interiors, etc. On the flip side, I did a 350 ft fence install recently (Wood privacy fence for residential). I had not installed a fence in 20 years. While how to do it is not hard, not having the “muscle memory” of doing that work, it ended up taking days longer than what I wanted and in the end I still made money, just not has much per hour as I would like but, the homeowner got a beautiful fence and singing the praises to his neighbors. I put in twice as much work as needed for that job but today I am better. If a neighbor called me today to install a fence, I would be twice as fast now.
What is the 11th commandment? Thou shall not fool thyself. Know the limits of what you can do. If you want to offer something you are not confident you can pull off, then start practicing. People will let you do a lot for free to get practice and be forgiving of less than stellar results (crap, they didn’t pay for anything).
Keep in mind, you may take jobs that are not the best paying. For example, I have bank drive-thru lanes that I clean for $100 per branch. Takes anywhere from 45 min to 1 1/2 hour. So pay is good to ok (I like to stay above $100 per hour). But, I have 6-8 locations per month that I do which is money I can count on but more importantly, it has lead to me doing parking lot curb painting (fire lanes) at two branches that paid very well. It led to 3 building washes that have paid well. I have another commercial property manager that my first job was a very small 30 minute job that paid $100. Kept in touch with them over the last 4 months and this month I have gotten 4 jobs for a total of $2500 from them. From that, one of the building owners this property manager handles, liked the work so much, he invited me to bid on a job at his house that would be a $3600 job. It is all about relationships, being real and genuine, delivering superior results even if you have to work harder, stay longer, have increased expense to do so. I don’t believe so much in Karma, but I do believe that if you are a decent human being, put the customer first, over deliver on expectations, etc then in the end you will be successful.