Other contributors have said "How can you make yourself trip?" is the same question as "How can you make yourself trip on shrooms?" If you believe that these are not asking the same thing and should be answered differently, click here
You don't make them, you grow them. It's much less of a hassle than weed because you don't need electricity sucking lights. Psliocybin mushroom spores are legal in most US states and available...
You would need to find the right diet for you in combination with adequate exercise. You might want to consult your doctor or nutritionist to figure out which diet is suitable for you (low carb, low...