First cycle for myself

New year new me, but this year I didn't give in to that shite this year,but I've decided to buy cycle to start having some good habits, about myself : 28/m/6:1/70kgs

Decided to get myself a cycle, planning to buy non geared lucifire invalid (pics attached) Just need to know your opinion, I have driven non geared cycle when I was a kid, and my budget is tight, so just let me know about the pros and cons of the cyclenand gear and non gear

Thanks everyone...