Trying to buy LCAI pre-sale, but confused. Any advice appreciated.

I'm hoping there's a solution to a problem I am having being new to crypto.

I want to buy some Lightchain AI (LCAI) that's in pre-sale. I followed all the instructions on the site but the "gas fees" are like $115 and I only have $60 of etherium I bought and specially downloaded and set up MetaMask and funded the Etherium there just to do this.

I can't buy any amount with my $60 etherium, but they mention ERC-20, which seems like the "underground tunnel" that some people use as a metaphor for second tier type Ethereum transactions… but ERC-20 is not a network I can select or enter on MetaMask. I was able to import that LCAI coin and see it on my dashboard, but since it's not being officially traded yet it's really complicated for me.

Is it just that LCAI doesn't want my $60 and anyone who wants to buy it pre-sale has to pay this $115 "gas fee"?

So confused…