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Plants propagated from male vines will be male and those propagated from female vines will be female. But, if you are taking cuttings from an vine that has not fruited yet, you will not know if you have a male or female vine until the plant flowers. With hardwood kiwi cuttings rooting, the use of rooting hormones is a must. However, softwood cuttings generally root easier either way. Stick cuttings in sandy soil and keep moist. Allow to remain this way until next planting season when roots have established.

Kiwi has fine, fibrous roots that are quite shallow, and may extend from the plant 2 or 3 times the width of the foliage. This article has more information on kiwi: https://www.gardeningknowhow.com/edible/fruits/kiwi/growing-hardy-kiwi-vine.htm

You should be able to grow either tropical kiwi or hardy kiwi where you are, but may have better luck with the tropical varieties.

Until they flower, it is hard to tell the difference between the males and females. Some varieties have slight differences between male leaves and female leaves, but not many. Here is more information: https://www.gardeningknowhow.com/edible/fruits/kiwi/sex-of-kiwi-plants.htm

It is difficult to tell the difference between the male and female plants before they bloom. With the arctic varieties, the males will have a bit more variegation in the leaves. But other varieties are impossible to tell before blooming. Here is more information: https://www.gardeningknowhow.com/edible/fruits/kiwi/sex-of-kiwi-plants.htm

I would not set out the seedlings until they are at least 1 year old. Kiwis are very susceptible to root rot their first year and it is best to keep them in the drier pots for a year before planting into the ground.

There are a few possible reasons your not getting blossoms. Are you sure you have a male and female plant? Proper growing conditions and pruning techniques.
I have listed some articles that will address all of these possible problems and issues.

https://www.gardeningknowhow.com/edible/fruits/kiwi/growing-hardy-kiwi-vine.htm

https://www.gardeningknowhow.com/edible/fruits/kiwi/pruning-kiwi-vines.htm

https://www.gardeningknowhow.com/edible/fruits/kiwi/sex-of-kiwi-plants.htm

Here is a link to refresh you with the care needed.
Your plant may need more water to get established, then you can back off.
Make sure the soil is well draining.
Full sun is needed, but a new plant may need some protection from the hottest part of the day.

https://www.gardeningknowhow.com/edible/fruits/kiwi/growing-hardy-kiwi-vine.htm