What brand is this (maybe Eastern) frame? Is it good for a first bike?
Based on the frame it looks to be a flatland styled BMX. The actual model or brand is hard to say, can you provide any additional pictures of what the decals say or the head badge?
Assuming that you are an average sized adult that is not planning to take up flatland or BMX riding it would not be ideal. You would be best suited finding something that will be more comfortable over an extended amount of time and fit your body a little better. It will save your knees and back.
If you are going to be trying your hand at BMX then sure give it a whirl. It appears to have a gyro (meaning you can spin the bars all the way around without tangling cables) And a sturdy BMX 3 piece crank. The only kicker is that if it is an department store bike aka a BSO, then it was probably intended for a young person and not designed to take the weight of an adult beating on it, so you may want to invest in one that is made for an adult.
A bike is a bike, if you end up loving it and breaking the bike, that tells you that it would be worth getting a little more serious with your next purchase.
EDIT: here is the bicycle blue book on that bike, looks to be a 2010 Eastern Shock. Bicycle Blue Book
Notice the excellent price is about 100 bucks, if it's not pristine i would shoot for less.