If you want to learn a technology, but don't know what to learn, you can consider the following points:

1. Interest: First, you should consider your hobbies, what kind of technology you like and what kind of technical goals you have. If you have a strong interest in a certain technology, it will be easier and more enjoyable to learn.

2. Market demand: Secondly, you can consider the market demand and see which technologies are popular in the current market, which can bring you more employment opportunities.

3. Learning difficulty: Thirdly, we should consider whether the technical difficulty is suitable for our learning ability. If a skill is too difficult, it may make you feel at a loss and affect the learning effect.

4. learning resources: finally, you need to consider the availability of learning resources. Whether the time, energy and resources needed to learn a technology can meet your own needs.

To sum up the above points, I suggest you choose some popular technologies suitable for beginners, such as Python, Java, front-end development, etc. No matter what technology you choose, you need to spend time and energy to learn and stick to it in order to succeed in the future.