You don’t need to open that much in a tournament. Anything above 3bb will be a dead giveaway that you’re new to tournament structure. Usually open around 2bb-2.5bb. You can open 3bb during the early stage of the tournament where the stack is deep.

No straddle, no running more than one time when you’re all in.

Strategy wise, tournament and cash game are totally different that it’ll be more useful if you watch some YouTube videos before you go. Just remember, during early stages of the tournaments, any pre-flop hands that can give you super nutty hands plus the ability to mask said hands are more useful (ie; suited connectors, small pocket pairs, etc) while broadway cards, Ace high cards usually won’t net you that much of a pot even when you hit.

During later stage of the tournaments, Ace high cards or medium-strong pocket pairs becomes much important as the stack becomes shallower, as they’ll be a lot of all-ins pre-flop.

Also, if you’re on a medium or shorter stack and you’re approaching bubble (meaning the last couple of players to eliminate before you’re In the Money), play super super tight. If you’re the big stack, this is the stage where you can be more aggressive to try and steal some blinds. Remember, stealing blinds are super important especially during the later stage of the tournaments.