To me a significant part of the problem here is definitions.
The OP is refering to herself as being in business when clearly she is playing tiddly winks in her hobby and expresses a desire to have nothing to do with a real business.
For those that don't understand what business costs are, a few Basic ones would be income Taxes, public liability/ indemnity insurance, business name registration, workers comp ( if you have it there) , payrol tax, sales tax, Advertising costs, Equipment allowance and depreciation, Wages and the list goes on.
One cannot simply say " They don't apply to me", They apply to all businesses. If you don't have a significant proportion of them, you are either operating Illegally or you have a HOBBY that derives income rather than a business.
I suspect a portion of the former is at play here and a significant amount of the latter.
The OP is offering up many excuses here to justify her position, some of them quite laughable and as I mentioned before, has not provided a single fact or numbers to justify her position but has offered an excuse for that too.
IN answer to the question which again is quite laughable given the assertions of knowing business etc, YES $225 is ridiculously under priced.
IF one says they are now experienced and IF they feel they have the skills nessacary to charge for their work, then this price is detrimental to them and the industry as a whole Wether they are working from home and playing tiddly winks and pretending it's a business or not.
IF you really feel you work is so good and brings so much joy to people, start off at $500 which will be a fair return for your efforts, make the people appreciate your talents and efforts properly and not undermine the rest of the photographers in your area or the industry in general.
The OP is now in the hypocritical situation of trying to defend her professionalism , skills and experince but at the same time Justify NOT charging an amount commensurate with those skills, talent and experience!
As if it should need stating, If one is experienced and talented enough to deliver a professional standard product then there is no justifyable REASON ( as different to excuses) NOT to charge their work out at a professional level price point.
If one does not have those skills and talent, Then they shouldn't be charging anyone anything in the first place.
The op has also gone from saying she will never do this full time to now indicating that she is looking to do it full time in the future. There are a lot of hypocricys in whats being stated here to make me think this is all a moot point and any advise is a waste of time.
As I said earlier and is even more clear now, it's apparent the OP is here to hear what she wants to and little if anything else. I am quite certain that her mind is already well made up. I believe nothing anyone says here is really going to make any difference to what she ends up doing which was decided before she even posted.
From RDKirk: First, let me check the forum heading...yes, it does say "Business of Photography" and not "Hobby of Photography." Okay. So we're talking about making money, not about hobbies. By "business" I am presuming activities that pay expenses and produce a profit over the long term.