Congrats on the house! An exciting day, so microwaves, vents, and hoods can vent 3 ways. Top vent outside, back vent outside, or recirculating in your face. If you are on an outside wall, the microwave should just have the motor spun to face the rear, then a hole needs to be cut outside and vented. It is very doable. 99% of all micros can do this. GE made a few models that start with JNM the “N” meant non vented. So check the model tag if you happen to have a GE. Great idea to vent it now as you will be there for many years. So the key here is if on the outside wall, because if not, then some tricky venting may be involved. A Handyman, contractor, etc., can do the job with ease.

Here is a great video I found on it https://www.youtube.com/watch?v=I855VYKHa6E

It is not hard. But there is the easy way and the pro way. They make saddle valves that self pierce the waterline as a kit with copper tubing. It is easy to do. Now, while the kit is available from any home center and, rather easy to install. I don’t always trust the reliability of those values. I always prefer hiring a plumber who can tap in a real valve in the line with a proper shut-off in the event of an emergency.

The best washers seem to be the front-loading or horizontal axis type machines. They hold a ton of laundry, are gentle on the clothes, and will give the best washing action to clean better. I really like the new GE ultra-fresh units in this category.

https://www.geappliances.com/ge/washer/front-load-laundry.htm