What are the strategies to reduce capital gain tax?

Do you sell at a loss to lower taxes?

I recently started buying stocks. And learnt about capital gain tax.

For example, I sell 100 stocks and make gain of $1000. Do I have to sell some stock which is not giving me any gain to counter the capital gain tax?

What are the strategies to minimize capital gain taxes?

Thanks y’all! This is confusing world to say the least.