Ours took just over 3 months from offer accepted to completion, chain of 4. But one of the buyers put a deadline on completion which got everyone to get a wiggle on.
I will say I had 2 previous chains fall through though, first after 3 weeks second after 2 months. It was 19 months in total from when we first went on the market and we had a 6 month break and changed agents after the second chain fell through.
(Not to scare you but just so you know what to expect)
Advice is to research the agents, look at listing's of each individual agent in your area and see who presents houses better. Ie best pics, detailed floorplans etc do your research and get recommendations if you can. I cocked up with our first agent who were a bit useless. Second agent had it sold in a fortnight.
Declutter massively but I also bought some brand new white sheets for the beds that I could just chuck on freshly ironed for photos and viewings. I never slept in them. I also got some cushions and bed runners and lots of nice house plants.
I had a tiny kitchen and I removed the toaster microwave and kettle from the worktops on the photos to make it look like there was more worktop space. 😅 And moved the bins out of view.
I also took all shampoo bottles, towels, toilet rolls and bath mats etc out of the bathroom. Only having a couple of plants on display.
I literally chased the photographer around the house moving stuff out of rooms so they looked decluttered (without looking depersonalised) so I had colour on the walls, books on shelves, picture frames, art and "some" toys in my childs bedroom but just made sure there wasn't laundry or junk on display or boxes and boxes of toys that proved we were bursting at the seams. 😅
I also paid for a gardener to do a good job on the hedges and borders and bought a couple of brightly coloured hanging baskets and green potted plants to frame the front door and to give it a little pop of colour.
Good luck OP. Xx