hi, guys. i hope you all are doing well . Anyways i just picked up my new remmington 870 shotgun today and i put a new 18.5 inch barrel on it. So i have some dummy rounds for dry practicing but i have no clue where to start, my father is a big frontsight guy but has little to no time (late hours) to teach me effective dry practicing. Are there any free intructional videos or basic techniquesi should learn? i want to be effective in a home defence/shtf situation just in case. any help is appreciated.