Can u advice some good online wallets please? 
From initial starting I'll suggest you to use Coinbase, blockchain or other online wallet. As the normal online wallet doesn't offer additional security option, there always chance to hack, but start making little payments it can considerable.no there is no additional risk of getting hacked in other wallets, if anything the web wallets you just suggested are riskier. specially coinbase because you don't even control the private keys and they can simply block your account and don't give your money back.
and it is not hard to use a "desktop" wallet such as electrum. the time it takes to learn it is very short. they are very user friendly and much safer than a web wallet.