It's game of bluffing and strategy build and once you have that skills it's not too hard and you can win also but to become professional then you need to have experience and master the game but would not say it's easy to play poker because it's strategy based game with being lucky.
To become a professional nowadays you need a lot of study, as well as talent, which is something that cannot be trained, because the market is crowded. Although anyone can make some money by studying a little and practicing, following basic rules.
What you say about being lucky only applies in the short term. Someone who clearly plays EV+ the more poker hands he plays the more he will win, despite having negative short-term streaks.