The consequences of a lack of knowledge in the tree falling always concern safety. Many elements in the operations of a cut are risky, therefore it is imperative to respect the rules and methods of safety.
First, a list for the equipment. Safety glasses, gardening gloves, work helmets, work boots, hearing protection and safety pants for chainsaw operators. The total price of this list can vary between $125 and $150. If you do not have everything in this list, abstain. If you do not want to invest in the right equipment, it is better to leave the work to a professional. There is no work where hazards are more present than in arboricultural works. The saw blades frequently revolve in the eyes, the branches can fall on the head, the wooden ball can sag towards the feet, the chainsaw can bounce and reach the legs, in short, the risks are omnipresent.
Personal aptitude must also be assessed. Am I sufficiently manual? The consequences of an awkward renovation are nothing compared to a mistake with the cutting. Am I comfortable playing a chainsaw? The strength and dexterity required for the operation of a chainsaw may be acquired over time, so it may be desirable to first have supervised practice by operating a chainsaw for lighter work.
Then, the security of the environment. Can the tree fall on a structure like the house, the pool, a fence, or worse: in a busy street? Do power lines have any chance of ending up in the fall of the tree? If you are unable to predict 100% the direction of the fall of the tree, knowing that the wind could betray even the most accurate calculations, one must be rigorous. If the angle is pronounced more than 20 degrees, although it may seem to make your life easier, there is a risk that the trunk will burst while you are cutting it. Arborists know the method to be used in such a situation, and it is not enough to just read to learn it. When in doubt, there is no shame in renouncing the project.