Claim Solana tokens bought by using Ethereum

Hi there. I reserved some Solana tokens during presale phase at dogen.meme website. I paid in ETH by using my Coinbase Wallet. When the presale ends I should be able to claim my Solana tokens but the problem is that the 0x… Coinbase wallet that I used to reserve them, doesn’t accept SOLANA tokens. I can log into dogen.mene by using a DIFFERENT Solana address belong to Coinbase but in that case the website returns zero claimable token (of course because the initial address has changed). To solve that problem dogen.meme admins suggested me to follow that (strange?) procedure: https://docs.dogen.meme/how-to-buy/how-to-merge-your-wallets. I never heard about that. As you can see I should “merge” my ETH address with a new Solana address of another wallet like Phantom for example. I’m here to ask you what do you think about that procedure. I’m really anxious because it is written that “Merge couldn`t be reverted”. Do I risk to share any sensitive information and loose my crypto currencies? Do the procedure work? Any other idea? Thank you very much for your help. Robert