There are no tips or tricks really. If you want pictures with wrestlers, ddt has chekis before and after shows, ajpw you need to join their fan club (fanicon app, very easy to join) and get there an hourish before the show. Bjw has photos before and during intermission. Otherwise you need to buy at least a signed photo at the merch desk. Expect a little bit of english here and there depending who. Abe, irie, kaz hayashi etc are pretty fluent. Diamonji so in bjw/lands end speaks perfect English.
If you send over you exact dates you are in places I can suggest things. Like dont write off track stuff like say bar045 shows or such out, tons to do in yokohama and the shows at radiant hall are close to the tourist sites, the main St and such.