What is considered speech delayed for a 3 year old?

Hello parents, i understand that different children grows at a different pace and i hate being the type of parent that puts unnecessary pressure on my child but also i dont want to be late in getting the help that my child needs (if she does) Can any parents relate?☹️ Anyways, my child can understand and execute instructions well. The only thing is i think her vocabulary is quite limited or she needs help with enunciation? She does speak but 60% of the time its babbling and the other 40% are words only i as a mother can understand 😂 i do see improvement day by day even though its slight. I would say that she can say a bunch of singular words now and she is trying to construct sentences (eg: ' i go outside', 'ok i go sleep now'). She is starting school soon and im super worried that noone can understand her in school. I guess im just a worried mum at this point, but going back to the qn at hand, what do yall think is considered speech delayed at 3? I feel like my daughter is doing ok, just needs a little help but my fam/relatives kept asking 'wah she still dont know how to talk properly' or 'did you brought her to a speech therapist already'. She is my first baby so im kinda lost and dont know if im doing this parenting thing right ☹️