There is something bad wrong with my plant please help!

the tips of the two bottom leafs on my new growth plant is turning brown and crispy like and curling upwards please help because it seems like its going up the plant

Are you PHing your water properly?

lmao i have absolutely no clue on that one... im used to just throwing them outside n letting them grow ive never had a successfull inside grow for this egsact reason... every time the leafs just die from bottom to top. but i had just thrown it in some new three way mix soil so i hope this actually fixes what was wrong with it

What medium are you in ? Also, how often are you watering her?

its in black earth and i do beleive it has bin over watered, i took it to a green thumb i know and he had fixed it for me but he didnt tell me he watered it tha day he gave it back to me so i watered it the day he gave it back to me atleast a pop can full of water and now the next set of branches is dieing!!!! how can i stop this???