Hi MrRoach Sir i was almost in same situation almost 2 months ago. I bought (TP-LINK Archer MR200 AC750) what it does is change any wifi to wired internet i had wifi in the shop but i wasn't sure so i bought a sim card with 1 year worth of internet the sim card and router from ebay total cost 80£ if that sounds ok to you it's the easiest way i know. The router is very very easy to use there is even an app if you want i promise any one can use it since i did  .

I know there are far more tech savvy people here but if you a simple solution that works well i know this works if you have any question i would love to answer.