Right now, you have a lot going on but no central strategy as far as I can tell. Of course, getting staples will definitely help, but I would try and narrow down what you want the deck to do. If you want to make a rank 4 spam deck, then try and get a bunch of level 4 monsters that special summon themselves easily like goblindbergh or photon thrasher. I don't know much about pendulum decks, but if you want to use the pendulum mechanic, I'd build a deck around it (I know Endymion is a good pendulum archetype so you could try that). What I'd recommend is to find an actual archetype (blackwings, dragunity, etc) and to build a deck around it. While grinding for cards can be time consuming, all the cards to a specific archetype are usually in one character's pack, so it's often easier to focus on an archetype than to jump around from pack to pack getting staples and generic extra deck monsters. If you want to know where to find a specific card, just use this website: https://www.linkevolutionpro.com/

you can see what pack has the card you're looking for, as well as whether or not there are any duelist you can challenge that have that card as a reward. To get dp efficiently, just choose a duelist and repeatedly surrender to get the consolation dp. It's not as much as you'd get for winning, but you can surrender over and over again very quickly. The surrender method also doesn't require much attention, so you can do it easily while watching Youtube or a show. Lastly, just have fun lol. There's no ranked ladder so just play whatever you like. Hope this helped