Yes. Get some cheap natural 3 strand when you are learning to splice, it holds its shape much better making it easier at first. You will need to tape the ends more often with poly ropes, and often work to maintain the twist of the ends.
I have used that stuff I hated it, it seamed to want to stick to everything as it was so fuzzy, I much prefer a hard lay 3 strand.I worked a water safety gig for a Disney production at a local State Park. We provided water safety for the actors, stuntman and camera crews as they worked on a local river. The stuntman had with them their own sets of rigging gear that we worked with also. They had quite a few 9 to 12 foot sections of three strand that they would use for whatever miscellaneous purposes they ran into for securing gear Etc. I found it very handy just to have some of these laying around to grab as needed. I'd like to have some of the exact rope they were using. Seemed to be a blend of cotton and polyester or some such.