Yes can be done, very well.
CEX.io is good to buy in any currency if you have the credit card.
check this out- CEX.io Review: Is This Platform Safe To Buy Bitcoin & Ether?
Is there advice able on specifically what to buy that can be trusted?
Bitcoin and Ether
for long term, which deskptop/moblie wallet is better? the coinomi and jaxx you guys have recoomended has a bad review. please suggest me one or should i go on try with those app?
Exodus you can try.