Trying to train Lab(almost 4, female) to use pee pads as "emergency", but my dog barely pees inside when I am home.

So my dog have some problems that I know it would not be able to hold pee very well, so I got some pee pads, so that I would be able to let my dog do whatever it needs, when I am not at home. Nobody will know when it would pee so dog walker would not be a viable option/

I bought some pee pads, and the training didn't go very well. I mean I have a hard time getting my dog onto the pee pad, or my dog wouldn't pee, and eventually, would lose interest in the treat and walk away…

So I put some pee onto the pad, hoping it would attract my dog and next time when my dog needs to pee, it would go to where there are the smell of the pee is. Where I am able to point at the pee and give it some treats later.

Is there tips that I can train my dog with?

My dog is not well trained, and does not have a crate/fenced area because the last family didn't train for it, and now my dog would whine and eventually I stopped the training.

Thank you.