With all due respect you've skipped a lot of steps and are basically trying to start at question 85 without dealing with the basics.
First learn how to keep your plants alive and thriving. Water and site (sun and shade) requirements and feeding. Insects will probably come with the growing season as well as the possibility of disease (these things may be no bid deal if you know what to do). You'll have to learn what to look for when inspecting your plants (daily). Soil mix requirements are essential. Etc., etc., etc...
Read and search this forum for basic culture and species specifics. Search the web to read about bonsai (in general). Also there are good articles on evergreengardenworks.com. Books may be available at public library. Plenty of videos on youtube. Join a club.
You have to do your research and reading. You need foundation knowledge before you deal with specific techniques that are down the road. Defoliation is not performed on young plants. (Keep all foliage to promote growth.)
Set yourself up for success. The joy of bonsai is the journey, not the destination. It is a process and you can enjoy your plants whether they are seedlings or masterpieces. Enjoy the closeness to nature and rhythm of the seasons that tending your trees will bring.
Best of luck!
Central MD 7A