first grow here and i was wondering how to get large full buds
Right! How to grow big ass buds...first off your plants look good you and are not doing anything wrong but if you want to consistently grow big buds here's a few tricks to help get you there.
The secret to growing buds to their full potential is tight nodal branching. To form this type of plant structure first you need adequate lighting and of course healthy green plants. Some might say to grow the right strain and that is true to a point but virtually any strain can be grown to its full potential if given the time and proper conditions. Starting plants out with crappy lighting causes a lot of space in between the nodes; a plant like this will never reach full potential. Start plants from seed under an hid lamp or some decent T5 or T8 lighting which should make for tight internodal branching; you want very little vertical space in between the branches. LEDs may not work too well for this unless they are of a very good quality.
An instant flip to 12/12 from 18/6 is a too steep a drop off for many strains; such a drastic time change does not occur in nature. The suns cycle changes gradually as the earth shifts on its axis during the summer. Gradually reducing the hours of daylight by let's say an hour per week just before flipping to bloom phase forces preflowering and helps the plant stay tight without stretching as much. Some strains react differently than others in this depending upon their tendency to stretch. You want the nodes to be so close together they eventually become one mass. That's the very definition of reaching full potential.
The ultimate bud mass increasing technique is monster cropping. That's when you flip the plant to bloom phase and then revert back to vegging for a couple weeks & then flip back to 12/12 again. Doing this forces the plant into preflower which makes tight nodes. It sets your grow back awhile as they plants transition back and forth but results in super fat squatty plant structures. Try it! Good luck and happy growing!!!