Need help with NFT flipping/trading

Hey everyone, I convinced my mom with nft trading/flipping, she'll give me 300$ to start with, and I'm kinda afraid to lose money, so, can you guys give me some advice on how to start nft flipping ?

• What is the best marketplace to start with 300$ budget ? (Opensea or Magic Eden)

• Is there any tools that help me know what collection is the best to invest in ? (Like Rarity tools and coinmarketcap)

• What is the most helpful nft flipping tutorial on youtube ?

• Should I start with Eth or Solana?

• eth Gas fees ?