There is no "best build". Experiment and try different things and see what you like. There are a lot of great guides in the guide section on the forums. Welcome to KaW and good luck.
Well to start off "The Best Build" is the build that works for you. There are different kinds of builds like Hansel having 75% spies and 1 attack building, an Attack Build having plenty of attack buildings and some spies depending how much spies you want and putting towers eventually and then there is a Hybrid Build which have equal stats for spies and troops. Any build is a good growing build if you think about it it just depends on your playing style although a a guild hansel is a good start and I recommend it to any new players as they tend to grow and explore lands faster.