teresa
It can take a while for you to settle your lo (one unsettled period a day & one unsettled day a week is a phrase I got told with my first) 1/2 hour is not too bad in the scheme of things... frustrating I know but quite normal.
My 2 aren't too bad (now), but my 2yo was a big frustration in his first year... he was the king of waking up at night & short naps for about 2 months. My #2 is easygoing by nature & also benefits from me having been through it all before.
My suggestion is to make sure you have a good wind-down routine & a re-settling one for wakeups & keep them consistent & it will give your lo the message as to what comes next... It won't work 100% of the time, no matter how good it is, but that is normal... you just want it to work most of the time... also expect it to take time & then you won't get frustrated at spending 1/2hour settling... it won't be like that for ever... my 2yo goes to sleep in 5mins nearly every time & it takes about 15mins for my 10wo