First off, welcome back to knitting ~ also, there's nothing to be
about! We all had these kinds of questions at one time or another.
Most times, a pattern will specify where the increases are to happen. It will say "increase at beginning and end of row" (or just one or the other) or it will say "increase ___ # of stitches evenly over next row", etc. If you are to increase at the beginning/end of a row, I always place the increases one stitch in from the very edge. If it is to be seamed, having the increases not right at the edge helps with having a nice edge to seam....if it is not something that is going to be seamed, having the increases away from the very edge makes a nicer looking edge.
Personally, I wouldn't use the increase that just puts a loop of yarn onto the right needle. I'd use the increase called 'bar increase' (which is knitting into the front and back of the same stitch....a.k.a. 'kfb') OR a M1L (slants to the left) or M1R (slants to the right). At any rate, the increase stitch gets knitted/purled just as any other stitch on the following row, whatever your pattern dictates.