Blogvicar made some really good points, but, as usual, I have an opinion too. For goodness sake, be your own editor! Go thru that manuscript until you see no mistakes, typoes, misspellings, whatever, and while you're doing that keep your eyes open for changes you want to make, characters you want to add, the list goes on and on. In my longest novel "The Bellwether" I first typed 2-3 times (I don't remember how many) on a manual typewriter, then 3-4 more times on an electric, finally a semi-computer, where I could at least make changes on the screen, and now finally a laptop (the best of all!) Anyway, I edited and revised that book a minimum of 30 times, all 800 pages. Today it sits at Amazon and doing fairly well.
Writing, my dear, is work, and you MUST do most of the work yourself.
After you think you have done what you can, then, I would look for an editor, and that's where I would look into a writer's group, or, possibly, even paying someone to look, but remember, all the critiquing and editing you will get from others (even the socalled professionals) It's only their opinion. You have to make the final decisions.
Keep moving forward and Good Luck with your goals!
James W. Nelson