How do I get into green tea?

I like all black tea, white tea, herbals especially, and rooibos. But I find green tea so so bitter and difficult to drink. Perhaps I'm doing something wrong? But I feel like steeping for 30 seconds is long enough.

Any good Japanese or Chinese brands?

Edit: first off thank you so much for the response! I've already tried altering some of the methods and it taste a lot better. I also think I need to get better quality Teapot pot. But I want to say thank you to everyone for all the comments I'm reading and using everyone's advice!