Jamie, TBH you need to slow down a little and try one step at a time, and really you have no idea how a fibre connection will function till you actually try it.
My suggestion is:
1. apply for fibre 100/20, its no worse than what you have now so really you should be no worse off, it could actually be the solution.
2. get fibre installed, keep cable for a month after you get fibre3. test the fibre connection on your devices, both wired and wireless, remember you get a new router with your fibre connection so see if that also helps. see if its better or worse over one or the other
4. if its still not as good as you want and based on what you find with the wired vs wireless in 3, you will either need a faster connection, or a new laptop (or an upgraded wireless adapter or a USB3 wired stick as mentioned)
dont over complicate things :)



