The normal suggestion for a place to start studying Husserl is Cartesian Meditations.
But I would suggest reading Ideas 1 instead which seems easier to read even though it is longer.
Another place to start is with his last work which is Crisis in the European Sciences.
Husserl is difficult to read. There is no getting around that. However, if you are interested in Phenomenology then it is rewarding to read about it from the source who invented the idea of this unique and interesting way of doing philosophy.
A much easier place to start with phenomenology in general is with Merleau-Ponty’s Phenomenology of Perception. Then once you get the idea about what Phenomenology is about then one can go back and read Husserl and Heidegger to get the wider context.
The most interesting thing in Husserl is Genetic Phenomenology verses Static Phenomenology. But there is not much about that in Husserl’s main published works. For an introduction to it see The Other Husserl by Welton.