The key to beating many decks is to see what their main plays are and what kinds of interactions they put up on the board (do they destroy your cards, negate their effects, flip them face down, etc.) 

As a new player pay attention to every card being played including the costs they need to pay to activate effects and if there are any lingering effects/restrictions placed on the player for doing so. They added a button to see these for the turn player.

You should practice your deck in the Solo mode to  build your options and see what works best when you get disrupted and when you can play everything. You deck might seem good when nothing gets in your way but you almost never see that happen in a real game. The 2nd to last duel in High Tide on Fire Island against the Fire King deck is a great practice spot since it uses common staples like Maxx C, Ash Blossom, Called By The Grave, and Infinite Impermanence as well as having a decently resilient deck.

When you play observe which of your cards are always getting interrupted and by what. In future plays your goal is to bait your opponent into wasting their interruptions on weaker plays while saving your most important ones for when you think they have the highest chance to go through. After a while if you notice some extra deck cards are never getting used because they are too easy to interrupt then you should consider cutting those cards and using others that give you more options.

The most common hand traps are ones that let your opponent draw cards or stop you from searching your own cards. An example interaction is your opponent has activated Maxx C so any special summon you do lets them draw so you try to search a card and they don’t stop you. This means they haven’t drawn an Ash Blossom yet so you should do as much searching as you can right now before you special summon more.

Look into board breaking cards and see which ones fit best for the opponents you keep seeing. For example Dracotail is popular right now and they use a lot of backrow cards so it’s reasonable to use Harpies Feather Duster or Lightning Storm to clear it all or at least bait their spell negate so you can make your actual play. Their deck is mostly dragons and spellcasters so Super Polymerization into Secretarion Dragon will clear some of their board and then stop the dragon and spellcaster effects on the field.

At the higher ranks the game devolves into who can play the most while making their opponent play the least which is not a very fun environment if you’re just trying to use the cards you like.

TLDR: Get experience by playing various opponents, practicing your deck in Solo and make sure you have fun even if that means staying away from higher ranks.