If you say you don't have a lot of time, and are looking for a quick fix, then maybe a treatment like botox or fillers or something might be good for you (obviously they're not everyone's cup of tea), but to be honest there is no quick fix with skincare or supplements.
The thing with collagen is that just putting it on in a cream form means it will likely just sit on top of your skin and feel nice, but not do much. You can take collagen supplements, I have read mixed results. In theory yes they can help supplement your body's collagen stores, but it won't necessarily be directed at the skin on your face. It will probably improve things overall for body, like your tendons, ligaments and yes, your skin. However it may not make a significant difference to your face, which is where you are wanting it.
Actually you would be better off using something that makes your skin produce more collagen itself. Something like Tretinoin, or an over the counter retinol will help over time. But it doesn't happen overnight.
You can get it by prescription at a dermatologists, or you can sign up to Skin&me or Dermatica to get a subscription sent to you monthly.
Basically, what Tretinoin does is:
increases cellular turnover (which diminishes as we age)
increases collagen production in our skin (which diminishes as we age)
And over time, it thickens the underneath layer of skin (the dermis) which produces a slight plumping effect.
It's not a miracle cream, and it won't make you look 25, but it will improve fine lines and wrinkles, skin tone and give an overall fresher and 'younger' appearance.
Also do you use SPF? You need to be wearing it everyday to help prevent further sun damage.
There are some skincare threads on here if you are interested. Or on youtube there are some bloggers who talk about skincare routines.
HotandFlashy is very good - she started using active skincare at 50 years old and has seen some good results but it has taken a few years.
Also Nadine Baggott has been recommended on here.