Matching lighting throughout a house brings a consistency in feeling in every room. Having dimming lights or low lighting settings are also highly recommended by sleep scientists to improve tiredness towards bed time.
Set up utilities
The sooner the better for this one.
For USPS mail, Amazon, and other shipping sites that you frequently use.
Meet the neighbors
Doing a small favor or asking a small favor of a neighbor early on can be a great opening of a relationship. Even if you are a reserved person, it is nice to let your neighbors know that you enjoy your privacy now, rather than have to have to tell them later.
Know where the electrical panel and the water shut off are
In case of emergency it is nice to have these items located.
Get a couple fire extinguishers
Usually an extinguisher is recommended in the garage and the kitchen.
Home ownership is a huge step in life and you deserve to celebrate and cherish this moment. This home will be where the next years of your life unfold and where you develop into an even better version of yourself. Congratulations!