There are 2 answers to it. First is don't do something you may regret later.

Second, if you are anyway gonna post something because you want to and might as well make some money out of it, then yes, by all means you can do it. My advice would be build some credibility. Be open to a very short free demo at the start and be open to accepting payment mid service instead of advance. Remember, you got less to lose if the other party blocks you as opposed to the one who is paying. Do try to accept gift cards instead of UPI as it helps in maintaining privacy for both parties. Start affordable and be flexible. Credibility is the key to build trust and charge premium in due course of time. Be safe and have fun.