I've completely changed my Farm design in two different saves in order to create a themed Farm so it's certainly something you can do. However before doing anything, use the Stardew Planner at:
Plan your Stardew Valley farm! ...on a coffee break!
stardew.info
to move things around and plan what you want. I found it invaluable for my plans and if you like this save otherwise, it may be worth it to you to re-do it. Heehee plus the Planner is like Stardew Legos so what could be better?? The Planner has a lot of items I forgot about which can help prod you into making new designs you might not have considered.
Once it's planned out, you could try waiting until the last week or so of the Season where you may have fewer Crops planted and then tear everything up, have Robin move the buildings to their new locations, and then start placing your Sprinklers and other needed things. You can then start the next Season with the bones of a new layout and slowly fill it in as the weeks proceed. You may find this less frustrating than a new save only because you have most or all of the materials ready so won't need to do the early game grind again before you can do much of your layout on the new Farm.
If you do want to change maps, the Beach map is fun but I see you have a lot of Sprinkled areas and the Beach map only has a small ~200 tile area to place Sprinklers. You can plant elsewhere but you gotta water it all yourself! I love the Beach Farm and 200 tiles is my happy size so no worries for me. Lotsa space for other non-Farming plans!
My favorite is the Forest Farm as you get Hardwood and Forageables as well as a reasonable amount of Farming space but it can be constraining so pay attention to the places you can Farm. Again I'm a small Farmer so I'd rather use the space for other things.
I tried Hilltop and after a while hated it so much that I edited my Farm save to change it to the regular Farm, and then wrote a coupla stories about the whole sordid affair. Its layout is certainly constraining but not as much as Riverland. I've never tried that one.
And I likely never will. I like Fishing but I'm leavin' the Farm to do it! I want to head South from the Farm to my favorite river Fishing spot and Riverland's circuitousness will get in my way almost as much as Hilltop. This is less good, your game should not aggravate you.
OK, unless it has the word "souls" in it.