This is not the best time to buy bitcoin,if you look at the market,the price is rising on a daily basis and it is almost reaching uncharted territories so the risk in which the amount of loss you could encounter if the market goes down will be really high ,so wait for the market to have a slight correction and then plan on entering it.Light weight wallet or hardware wallet is my first options to save bitcoin for the long term and make sure you have two back ups at the least.