manifesting

this is my first ever post but i would really like to know if anyone can relate. Okay so i really am interested in manifesting and watching subs but i feel like the only thing i can REALLY manifest is a SP. Ive been watching subs for years and every time ive watched them for a an sp they work and i mean EVERYTIME. However, they dont work for any other situations in my life. What is also confusing is that it seems like i can only manifest a specific guy that i already know. for some reason the subliminals dont work if im trying to manifest a new guy into my life. Maybe i should try other methods but idk. does anyone have advice or other methods i could try. Some examples of things ive tried to manifest are a new car, better self concept, and money.