How much are they offering you? 3 years relevant experience for diploma should be about 1.8k – 2k

My advice is not to accept such arrangements. Say you have something on for the next 2 weeks and you’ll be glad to join them once the contracts are done up. Your level is very junior and the contract is just a standard template they need to change the salary field. It takes at most 5 minutes to do up the contract.

2 weeks to consider other candidates & offer I understand, but offered already and need 2 weeks to finalize contract is plain lame. They are using the common trick of bluffing you down to work for 2 weeks and “assess” your capabilities. If they don’t like you after 2 weeks they’ll come back with some excuses to not offer you the contract and you would have wasted precious time.