Brake Fluid Leak Check

Its a stupid question to some of you but I genuinely wanted to know.

I am going to check if there is a leakage sa brake fluid ko dahil naubos agad yung brake fluid sa reservoir.

Now, is it necessary to have to a jack/jack stand at tanggalin yung gulong to check for any brake fluid leakage? Or kaya kong icheck kahit wala yang mga yan?

Another question, Kailangan ko din ba na tanggalin yung gulong if ifaflush ko yung brake fluid?

Wala pa kasi ako Jack/Jack Stand, just wanted to know if it is possible without those.

Whenever I check sa youtube its both naka jackstnd sasakyan nila at nakaremove yung gulong.

Thank you in advance and godbless