From teh photo I can't see if there is a threaded fender mount at the fork tip. If so, that is an option as I noted here:
[LED lights] Are bottle dynamos and hub dynamos compatible?

I used a threaded rod and several nuts for that mounting.

I generally do not recommend mounting a light that low, you get large shadows from small things like leaves on the pavement. And slight bumps or changes in shape of the pavement also produce large shadows. But if that is the only option, it is an option.

Or, maybe a P clip, not an ideal option but it is an option, I have never tried that option myself but I assume it would work.

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Question 2 - I think the light on the right side is best if you are in USA or another country where you drive on the right side of the road, then you have better light for the edge of the pavement if you are out in the country at night.

On one of my bikes (photo at link below) I have the light on the right side, but the light is high enough above the tire that an oncoming car driver can see the light without the tire blocking it. If my light was on the left side of the bike, the edge of pavement could be in shadow.
Light next to front wheel


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Is there enough tire clearance if you use this bracket which would be between your brake and the tire?
https://www.peterwhitecycles.com/ima...&m475DUPB3.jpg

That is the B&M474DUPB light bracket from Peter White, link to the page I got that from is here:
https://www.peterwhitecycles.com/light-mounts.php

But, if you mount the light low and close to the tire without a fender, you run the risk that water from tire spray could get in the light and damage it. So, I really would not recommend this option.

In the photo below, I have a bracket that I made that is similar to the B&M bracket I cited above, my bracket is a bit higher and note that I have fenders to protect the light from tire spray.