I'm probably already past my limit of asking questions, especially in one evening

.....sorry!
Ok, I have a little while before I have to decide this, but I have a questions about 1 year vaccinations...
1) Are the "1 yr. Boosters" supposed to be done when SHE turns 1 yr. old....OR are they supposed to be done 1 yr. after her last puppy shot?? For some reason I had it in my head that it was supposed to be when she turned 1, but my dad thought it was 1 yr. after, so now I'm confused....logically, I'm thinking he is probably right
2) She will need a 1 yr. booster of Distemper, Hepatitis (Adeno-2), Parvo, and Parainfluenza, right??? And a 1 yr. Rabies booster too, correct?? (Although, I will NOT give those on the same day!)
3) Then, do I start having titers done every year after that so I can check to make sure she has a good level of immunity and not give boosters until those levels become too low?? or go ahead and give them every 3rd year? (Should I have titers done at her 1 yr. and decline DHPP if her levels are good, or should she get this at 1 yr. no matter what?? I think I've read that she needs the Rabies at 1 yr. no matter what.....)
4) I know there is a lot of info out there supporting only doing the Rabies vacc every 3 yrs. (and as luck would have it, "Triennially" is the law here in OK), however does that mean you give the "one year Rabies shot" every 3 years, or are you supposed to be giving the "three year Rabies shot" every 3 years??? This one REALLY confuses me.....
All the vets in my area tend to over-vaccinate, it seems, so I'd rather have decided what she is going to get rather than rely on them to tell me what's best. (All but 1 of her puppy shots contained the Lepto vacc, and ALL of them contained the Corona vacc

.....I WON'T be doing that again!!)