Megs 105 and 205 have a fairly steep learning curve IMO. So for a beginner I would definitely not recommend them. Some may disagree, but I just feel that way because of the lack of "working time" both of these products (more so 105) have.
I think the best choice would be to get the Menzerna SIP/106 combo for a two step correction. And for a 1 step correction I would get the Menzerna Power Finish.
Both of those products work GREAT, and are easy to use with a long buffing cycle. IMO , these are the easiest fool proof products to learn with. While its going to take good technique to get great results with the products, they offer a pretty big learning curve to get used to with. and You wont have to worry much about dry buffing.
My favorite product line on Autogeek is Wolfgang. All of there exterior car care products are top notch IMO. And very easy to use. They offer polish's with there product line that are even more user friendly than the Menzerna. BUT keep in mind there polish is made by Menzerna and is often compared to the combo I suggested up top (SIP/106). Cut and gloss is the same. The wolfgang polish is said to have more oils in them so there more user friendly, but to be honest, both products seem the same to me. I actually find the Menzeran 106 really nice to work with.
Also keep in mind that the Wolfgang polish's are twice the price of the "similar or same" Menzerna counterparts. So my suggestion would be to get the 16oz Menzerna polish's.
For the SIP/106 combo (or wolfgang), the simplest pad choice would be a Orange 5.5" flat Lake Country pad for the SIP, and a white 5.5" flat Lake Country pad for the 106 (or Gray if you have very workable or soft paint, cant hurt to have both white and gray on hand). If you are working on a ceramic clear coat I would suggest the Cyan and Tangerine Lake Country Hydo-tech pads.
For the Power finish (203, 1 step product), you can tailor the pad to what you need. but a white pad would be recommended imo. If you use a tangerine HT pad, you will get more cut and finish even better.
Hope that helps keep things simple for you. With a polish, I like to keep things simple with the pad and product selection. There are so many different combinations that can be used it will make you dizzy, but this combo is tried and trued by many people and it works.
You can also use the Power finish (203) in place of the SIP. If this works well, you can avoid having to buy the SIP. So I would make this the first order :
(these are very good prices in this combo)
Menzerna Power Finish & Super Finish Bundle, Menzerna Polishing Compounds, Menzerna PO203 & PO106FA, car polishes
The SIP (Super Intensive Polish) is only offered in a 32oz bottle at AG, and IMO is stronger than the Power Finish, but usually need to be followed up forcing a 2-step correction. You may not need it, because the Power finish is not that far off in terms of cut. But here is the link :
Menzerna Super Intensive Polish, Menzerna PO 83 , Mernzerna PO85RD 3.02
For a DA polisher like the PC, these are the most effective pads going. (besides the Hydro-Tech, which i prefer more). You will want the 6 pack at this price. I would start with Orange, white, and gray pads :
Lake Country 5 1/2 x 7/8 inch Beveled Edge Pads 6 Pack, foam pad kit, build a kit, buffing pads, curved edge pads
For Hydro-Tech pads, heres the link. These may work better on your paint, and finish out better.
Lake Country Hydro-Tech 5 1/2 x 7/8 Inch Foam Pads , hydrotech foam pads for water-based polishes, lake country foam pads, buffing pads
You will need this backing plate to work with these pads :
lake country 5 inch backing plate, 5 inch backin plate, 5 inch hook and loop backing plate