So now that you have several of the key characters out of the way... Let's talk decorations.
Dollar Tree https://thepettiecoatjunction.blogspot.com/2023/10/getting-married-but-you-dont-have-no.html has so many items online and in store that you can diy. Places like Facebook marketplace and offer up (app) you can find bulk decorations for low prices or even for free!
athriftybrideshop.com with amazing affordable prices for Brides on a budget
You can get together with a group of family and friends and brainstorm some low-cost wedding decoration ideas! Vases with floating flame less candles make beautiful and in expensive centerpieces.
There are tree branches and seashells from the beach. Using as much hand pick greenery is also refreshing and no cost. I think that thinking outside the box and repurposing many things are also great ways of acquiring decoration items.
Look around you house or ask family and friends if they have vases, curtains, table covers.
Be eclectic, be bold yes do the mitch match thing! It will all work well together. Stay away from narrowing to certain colors instead broaden your horizon and welcome more colors into the party!
Be Wise Be Creative Be Thrifty