I wear Decathlon which are about half the price of the big brands. You do need to make sure it's an appropriate running shoe rather than for fashion. I used to go to the local specialist shop, they're great and it's a good starting point for newbies but I found that ranges updated and it was hard to find consistency for my fussy, awkward feet. Out of season colourways are a good way to get discounts on quality shoes.
My trail shoes are mainly used in winter or exceptionally wet summer weather. My usual shoes are sufficient for grit/ lowland fields at this time of year.
There are 3 C25k+ podcasts, Speed (intervals, 27mins), Stepping Stone 40 mins and Stamina 45 mins. The pace in Stepping Stone and Stamina gradually increases through the track. I use them regularly when I want a quality paced run and will play them back to back to run 10k.
I think I might loop C25k tracks to gently build up running time/ distance beyond week 9. I'm fit, but that's actually a disadvantage for a slow-recovery injury because it's too easy to try and bounce back into old habits and I need a strategy to gently get beyond 5k. Once you're fit enough to do 5k, it's pretty easy to keep adding a few minutes here and there and build it up. First time round, I completed it late March and 2m later ran an 8 mile race having squeezed in training up to 10k/ 6mi. Then found myself talked into a HM while on a post-run high 😂
The HM was 6m after the first 5k!