Now what should i do as a newbie and howto get bitcoin BTC ?
Welcome to the bitcoin, you can start with buying the bitcoin now if you have funds, if you're not have it i suggest you can go with join the airdrop / bounty but with your rank now it's hard to join them. But just patience for 1 month to reach jr.member rank then you can join with them.
Actually, if you want to enter in the world of cryptocurrency yopu should have background about is so that if you start in investing you may not lose a lot of money. In addition, id you are newbie you should start in investing in bitcoin and then invest in any kind of altcoin. Try to study all about cryptocurrency especially bitcoin simply because it is the first cryptocurrency. If you are newbie in this forum you should read and posts about cryptocurrency and your rank must be jr.member above so that you can join in signature campaign. You can earn bitcoin through joining and participating in bounty campaign.