Fuel lines leaking, Two steps forward, one step back Options

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Well, as some of you know I had three leaking injectors when I went to pull the car out of storage after a couple of months. Two sealed up after running the car a bit and one I had to change out for new injector. Of course I was elated that I had solved that problem BUT....as I returned from a test drive I saw gas leaking onto the driveway in another spot. Seems that now a fuel line is leaking. Appears to be a cloth line leaking just after exiting the firewall (near the doughnuts as seen in the pic below).
I believe that the are the lines that I should be changing out anyway? I'm fairly certain that most of thessee lines are original. Posting a couple of pics.

Looking now for recommendations.....change out for all stainless steel lines? Are stainless replacing those in the engine compartment as well as forward to the gas tank? Any diagrams showing the ones that I need to consider replacing?

Also what level of DIY is this. I'm fairly handy but not a mechanic. Can I do this myself? If so would I need a lift in order to do it?

Appreciate the input.

Steve