Is it risky to have a large transfer in my bank statement while applying for an STV Visa in Thailand?

Hello,

Two quick questions.

I am going to apply for an STV Visa (as I have to take online courses from Thailand for a 5 month semester).

Is it risky for my visa application that a transfer of 4500 euros (to reach the required 6000 asked euros) is present on my bank statement - since a member of my family decided to lend me this money ? I have a scolarship that would approximately fulfill the 6000 euros requirements but it comes in my account monthly so my only solution was this big transfer.

Second question, I'm trying to book a refundable 5 days quarantine package on [members only]/. I received an e-mail asking for my passport to complete the reservation. Has anyone used this website ? Is it safe ? Thanks :)

#STV