Hi, welcome to the forum take the pads out the caliper on the front brake and see how they are, they might need replacing? the brake would also need a fresh bleed (is it hydraulic?) if it has air in the system, not sure if you're familiar with hydraulic brakes, there are a lot of tutorials on youtube etc...
Same with the rear pads, are they ok? do they hit the rim square? V's can be good if set up properly. Look up in the forum, you'll find plenty of info and feel free to ask if you need to!!!