Yep, money pit... You will learn to know, "The Joys of Home Ownership". But cut corners when you can, spend in other places, and if your neighborhood grows in value, you'll make money. If not, still way better than renting. The mortgage interest deduction is enough to justify it.
On windows, we did "off brand" Acorn windows in our place in Colorado. Just sold last summer, after 15 years at 9,000 ft. they were still great, zero issues. Alum clad, wood windows. Not as nice as Anderson, esp. the screens, but much lower cost.
Congrats on the home, just making it through the loan process is a major accomplishment, as much as it's a pain, I still think it's amazing someone will give you $100s of thousands of dollars if you promise to give them a few thousand a month. Private property is how America has created wealth and one of the backbones of America, in my simple minded, limited experience based opinion.