look like straight neck squash thats best i can do.

Are those good to harvest young? Like zucchini

Yes, both straightneck and crookneck varieties are summer squash. Used before seeds form. 4- 6 inches in length are usually the numbers quoted, But they can be used any time up until the skin becomes hard and the seeds become non palatable. Generally, they are a bit smaller than zucchini.

Thank you. sounds like it needs to be picked very soon

Generally I'll pick YSN & YCN & Zukes about 1-2 days after they bloom while they're still about the size of a chicken leg or slightly larger.