Congrats on the two batches. Hope they are drinking well.
Temp control should be one of the first things tackled. It's critical. Unless you have some sort of stable cellar with temps's in the low 60's year round.
A drill with the $3 paint stirrer will aerate wort just fine. RDWHAHB. Concentrate on brewing consistent good beer then
tackle the all-grain process. It's another kettle of fish entirely, fraught with heartbreak and confusion. But it's fairly straightforward once you learn all the variables and what to do.
Welcome to the obsession!