hi. so every time i try to get on minecraft it says "out of memory" and i went on the "out of memory" page thing it said to go to, and i did all the things it said. but it still says "out of memory". what do i do now?

hi. so every time i try to get on minecraft it says "out of memory" and i went on the "out of memory" page thing it said to go to, and i did all the things it said. but it still says "out of memory". what do i do now? i have a dell computer.