Welcome! Yes I'd say you are very new lol.
I have heard of B&G springs but I didn't know they offered any for mustangs. Either way, 1.75" is a moderate-low drop. If you leave your stock isolators in (black rubber pieces around the spring ends in the front & a rubber dish on the bottom of the spring in the rear), the drop won't be terrible for daily driving. There may be some driveways or entrances you might scrape on but overall it shouldn't be terrible.
Do keep in mind that most of the aftermarket springs stiffen the ride up noticeably. On a smooth road the ride isn't harsh, but take a minute to think of how many smooth roads there actually are where you live.
I would suggest some caster camber plates or camber bolts at a minimum to get your front geometry back into spec after the drop. An alignment will be required regardless of what you do.
Depending on their condition it might be helpful to get new shocks/struts since you're already tearing that area apart. If the spring load is not properly matched they will accelerate wear on the shocks/struts.
From what I've seen, most guys daily driving their cars choose springs that lower the car 1.25"-1.5". That range is a comfortable drop that looks better than stock height, but is still very streetable.
12 Black GT500 SVT PP l VMP TVS l JLT123 l O/R X l 28x11.50Rx15 M/T Street R's l BMR Suspension l Recaros
03 Sonic Blue 3.8 / 17 Magnetic Fusion Sport 2.7 EB