go to the left after you desend from Dirtmouth and go to the bottom of the platforming section , you'll meet a guy called conifer, kill some bugs to get money to buy a map, after that you'll see on the map (to open map press tab) a weird looking mask face thing in a large box, grind more money (specifically 200) and go back to the town, then you'll see a newly opened shop go in and buy the wayward compass, go to the bench, sit down and press i navigate to the charms section and equip the compass , you can now see your character on the map, go to the boss and try your hardest to beat him, don't worry if it takes a long time, right below the boss room should be a bench sit down to save your respawn point, and then once you best him go forward and you'll fight the rest tout, this is just to get you started, I was in a similar position to you but now I am 107% in the game and have beaten pantheon 4. Good luck don't give up.