Here's the deal. Coming from an acoustic background, I know very little about amps other than what I've been able to glean from You Tube. I have a G5220 and a Roland Cube 30 amp I was able to pick up as a practice amp. I play for my personal and family enjoyment only(mainly personal). The amp works well for what I require volume wise. I've been keeping all guitar knobs fully open and only using the amp for adjustments so far. My question(s) is, I would like some guidance as to basic settings for different genres of music..... specifically Blues, Country and old school Rock and Roll (think Buddy Holly, The Ventures era). When am I likely to use the clean/lead channels, gain, reverb, delay etc.? I'm definitely not a rocker(although may be"off my rocker"for appearing so dumb here). I know some of you are going to suggest I use my ears which obviously will be my final step but just would like to get some ideas what the kind members of this forum are using in these situations. Many thanks for any suggestions.