A few things.
You must pay your lawyer before your court date. If you do not pay him, he will not show up as he is under no legal obligation to do so.
If your case gets dismissed, that means you will not have to do anything with court. No fines, no fees, no record etc.
If you get diversion, that means you will have things to do with court. They will hand you a paper telling you the amount of money you owe in fines, fees etc. They will give you directions on how to pay these.
From the store, you will have these regardless of how court goes. You can be assessed a Civil Demand. Contact them and start payment arrangements. They will take $20 a month, $50 a month etc. Do not pay more than you can afford, but pay as much as you can afford. You may have to do without Starbucks coffee for a few weeks, but get this fine paid off. You will have a trespass. If you return to any of their stores, sister stores or parking lots in that state, you can be arrested for trespassing. Do not risk it as it will most likely kick your shoplifting charges back to the surface.
You can be put in a database for thieves. You will be in there for seven years.
Good luck.
Oh and tell your fiancée. You would rather him hear it from you than a third party down the road and then you will have serious problems. Its not that big of deal and he can be of help to you.