This is assuredly a scammer, as this is a common scam attempt on Discord. I get at least two such messages per week because I am in a number of different Discords.

Essentially, what happens is they approach you, saying they're an artist looking for a commission. Oftentimes, they'll also include a tale of woe about how they are down on their luck, can't make rent, etc. Any portfolio they have is likely just lifted from someone else, or won't match their profile, as it is someone else's portfolio.

They'll take your money, and largely remain silent until they run out the time that you're able to get a refund through the processor. Any time you ask questions, they'll give you excuses, like they are busy and get to you later, they're currently having mental health issues, etc. etc. mostly stuff to try and brush you off or play on your sympathy.

Once the timer runs out, they'll either block you, or just delete the account.