please advice

i... i dont know where to start , my husband and i are both below 21 but above 18. we are lawfully married (with certificate) and i am currently pregnant with our second child. we have a daughter that just turned 1 this month. we need advice on housing (rental) , is there any possibility to rent from the hdb in our case ? my husband are working while studying at the same time. we dont receive so much help and we didn't apply anything (food ration , voucher etc) i guess , we just dont know how 🤷🏻‍♀️ to add on , we are currently staying at my mom's 1 room rental flat and there's like 7 of us in the house. it's very cramp , no space at all and soon ill be giving birth. my family doesn't help much 😌 even now... i have to fast as theres no food at all. i dont know what to do. please advice , thank you