Not only are part-time PCT positions but there are also per diem positions (which provide even greater flexibility but usually no benefits).
In my opinion, it is worth it. My story: I was working full time as a Medical Assitant when I decided to pursue Nursing. I cut back to part-time to do my pre-reqs and then to per diem during school (working 1 day a week and more during school breaks). During my 5th of six semesters, I realized too (with the advice of instructors and other students, that I should get acute PCT experience). I was worried about about making the change also because I adored my coworkers where I was at, the mission of the organization that I worked with and the patient population but I had outgrown my position and desired new challenges. I left on great terms, asked for letters of recommendation and references. Even though the pay was $3/hr less, I knew that the networking and internal status at the hospital would give me an edge when it came time to apply for the new grad residency program there and that in the long run would be worth it. After only 3 months there and still on orientation, I applied for their NewGrad RN Residency, interviewed and was offered a position!
You could still continue your current role and make the experience relevant during an interview. However, you won't have to make a full-time commitment to become a PCT and it will likely make you a more desirable candidate (especially if you apply to hospitals you want to work at, you will already know their mission/culture, charting/EHR system, policies etc etc).