There are two options to obtain a tree, you can choose a natural one from those sold in nurseries, this option is very ecological, or buy an artificial one in a store.
Natural Tree Tips
To choose a good natural fir: before buying it, check that its leaves are green and do not fall, for this it is enough to move it slightly. Also, they need water, you should water it a couple of times a week and keep it away from heat sources.
Artificial trees tips
Artificial trees are usually cheaper and easier to find than the previous ones. Also, another advantage is that its branches support decorations better and have a lower risk of fire.