Wireless bridge or fiber for offices 300m apart?

Hi all,

I am building a Wi-Fi network for a location which has an upper office and a lower office about 300m apart. I am planning to have two or three Eero Pros providing Wi-Fi at each office, with the two offices connected by either hand-laid fiber—it is in a forested area of California and I reckon i could dig a trough between the two sites and lay fiber—or use a wireless bridge.

Internet will be provided by Starlink, but I would like the network to be able to handle up to about 1Gbps in case Starlink delivers on its promise of increased speeds.

I have a few questions:

1. If I were to go with fiber, what goes in between the RJ45 cable and the fiber cable? Is it a switch with ports for both types of cable ?

2. I have also heard GigaBeams are good. Would a GigaBeam or other Ubiquity wireless bridge be appropriate for this—and less of a headache than fiber?

Any guidance much appreciated!