Hello,
I've been using point-n-shoots for as long as they've been available. Of course, they've gotten better over the years, but not sure if they're any better than today's top smartphones. I wanted to switch to a DSLR. I bought a Canon Rebel T6 in 2017. I was on a budget. But I knew within 100 shots that it wasn't enough and that I'd outgrow it. I sent it back and saved for something better. I couldn't justify the leap to full frame, so I went with a Canon 80D kit with EF-S 18-135mm f/3.5-5.6 IS USM + EF-S 55-250mm f/4-5.6 IS STM lenses. I hardly use the 55-250, but I haven't done much wildlife photography yet. I still have a lot to learn and need to get out more.
As others have said, glass is where noticeable improvement happens. I have a small collection of EF and EF-S lenses. But my recent "L" lens purchases yield nice results. I bought a 100mm f/2.8L macro lens and a 24mm f/1.4L, both refurbished, directly from Canon. These lenses, as well as my other EF lenses, will work on a full frame camera if I opt to upgrade my body. My wife and I are driving to Maine this weekend. I hope to take a lot of photos and to capture some great (for me) images. I borrowed an EF 75-300mm and an old manual 500mm lens for some reach along the beach this weekend. I'm not sure if they'll shoot as good as my "L" lenses, even with the extra reach. But I'll try them out. Again, making the time and getting out is what I really need to get better!
Good Luck!
Scott