Usually.
Im not a car mech but ive done a fair few.
If you are reasonably competent wih a spanner and methodical then should be no issue
How ever as stated above access and toolage might be an issue. Im lucky enough to have big windy gun and big volumes of air at home.
My experiance of pins ( propper pins not something that kinda fits the hole) is that running is generally improved.
Land rover was 2 teeth out on ip and 1 tooth out on the cam when i got it ran smoky. With real pins in and belt done right it was like a different car.
My berlingo was done by a garage and they got the ip well off that it ran into limp mode any time it went past 3k revs. Fuel economy was good though. Reset it by pins my self- car doesnt go into limp mode. – how ever ive done em in the past with a sharpie. Its also possible to cut the current belt in half in places in some cases and pull off half before sliding new one on along side it- cut old one totally off and slide new one fully on.
Always turn back two full revs of the crank by hand and check the tension again. Twist test if it doesnt have a way of tensioning by torque.