Small account, big account... it doesnt matter if the broker is fraudulent.
That's the reason why we have to research on brokers.
Some provide segregated accounts /or insurance

if u have these concerns, then why not try putting in just a tiny amount (up $ 1 for some brokers)... until u feel comfortable adding some more.
Nobody is obligating un to put all of your money in one/several of them.

U actually must be self-reliant.
But asking around helps too. (not the fundamental questions that can read up on your own)