Luno was one of the first crypto apps I started using and I've found it to be the easiest platform for buying my crypto and one of the cheapest - Luno does not charge any fee to trade a maker order and the fee for a taker order is only 0.1%.
I've been using Luno since February and whenever I have any questions Luno's support have responded within a few hours with clear and comprehensive answers.
I'm now with Bitcoin Pioneers, who work in association with Luno to support adoption of Bitcoin in the U.K. I have been given a Luno code that will give you £10 of Bitcoin instantly (no deposit or purchase required). Luno give you approx 4% interest on your Bitcoin so if you want to you can create a savings account in Luno and put your £10 into your Luno savings account to earn interest.
To get the free £10 of Bitcoin just download Luno's app or go to https://www.luno.com/en/signup to sign up, then after your account is verified (takes a few minutes) enter BPKSteele10 in the Rewards tab and you'll get £10 of Bitcoin instantly. UK and 18 + only.
If you want to learn more about Bitcoin you can access a free monthly webinar hosted by Bitcoin analyst Jason Deane including an open Q & A session. Jason provides a jargon-free introduction to what Bitcoin is and why Bitcoin is important - just select yes to marketing when you sign up (you can change that setting at anytime). Jason's twittter - https://twitter.com/JasonADeane