I am a Mathy person, and I understand your pain. My eldest (almost 8) still battles me on math.
One idea I have for seeing numbers ( the abstract symbol representing a quantity) and the concrete amounts: have her work with beads, beans, cubes, whatever, and have her build quantities. (Don’t worry about tying it to the number yet. Just ask her to make a group of two, three, etc. Work your way SLOWLY up to ten or so.). Then, after she gets the quantities, maybe make cards with the Arabic numeral and a dot showing the amount. When she builds her groups, have her match her card with the number group it represents. After she matches them, you can explain what numbers stand for.
With my eldest, I had to keep lessons SUPER short (5 minutes MAX), and just be encouraging. (SOOO hard for me, to not let my frustration come through.)
Another idea, to reinforce what she learns above. Write numbers on sheets of paper and lay them on the floor. Have her go find quantities of things to put on the number. “Go find three socks for the three!”
Hope that helps,
Katrina