How can I design an outdoor space to have a pond and fire pit?

I like to get a vision for the over all space and feel that I want it to have. Do you want it to be just these 2 items or more decor & other features? How much room do you have?

Once you have a vision, set a budget.

Then work on specifics with those 2 things in mind.

There are many factors to consider when designing an outdoor area. Climate location, budget to name a few. Here are some sites to help you out.

https://www.countryliving.com/gardening/garden-ideas/g2314/backyard-ideas/

https://www.smartdraw.com/landscape-design/templates/backyard-plan/

https://youtu.be/hRgoh6UCFT0

https://www.diynetwork.com/how-to/outdoors/landscaping/the-essential-steps-to-landscape-design-pictures

Or enlist the services of a landscape designer or architect.

Start by measuring space, draw to scale and layout like you would a room design

Actually, you should start with a budget. Both of these things, even DIY, can get pricey. Now, take a look at your space. Do some homework and makes sure you know what permits (if any) you may need before you start. And, yes, certain types of ponds/water features are better in certain climates - so do a little research on that, too. Take the measurements and sketch out general areas on some paper. To get an even better idea, use a hose to make an outline on the grass of what you think you might like, or you can spray paint it too. The pond should also have two levels: one about 8" below the surface that has a nice ledge, 8-10 inches wide and then the bottom - which should be slightly graded so the debris (leaves n such) slides into an area where you can scoop it out.

If you've done your homework, you'll learn that, should you want to keep fish in the pond, it will either require bringing the fish in during winter (again, climate stuff) or making the pond deep enough that they can overwinter there in hibernation. The depth will be determined on your climate, again. Are there predators in the area??? (raccoons, birds, opossums, snakes) You'll also need a hiding place for the fish to escape to. Know that you'll need electricity and water readily accessible to the pond - I mean outlets and faucets right near the pond. Pumps and filtration systems are essential to keep the water clean - even if you aren't keeping fish. Your design should make sure the pump can push at least 25% of the water in an hour. (1000 gallons in the pond= a 250 gph pump.)

Your fire pit area needs to have a large enough perimeter so that there are no concerns for safety - and that depends on the size and type of pit you want. The surround area will need to be slightly graded, too, so that water doesn't puddle.

As you can tell, this is a BIG Diy project, two actually. Only attempt it if you already have most of the tools and skills required and are willing to learn/buy the remainder. Be realistic and hire a pro (for some parts) if this is too much to take on. It will cost much less in the long run and depending how much you hire them to do, you'll still get the satisfaction of doing the rest, yourself. Cheers!