Yes use GLES2.
1) Its portable.
2) Even for the PC follow the GLES2 way of doing things. (Unless your advanced and need GL3/4 features).
3) You want to use shaders period and GLES2 is good for learning the proper way.
Keep in mind OpenGL sucks on windows. The drivers are usually crap. Take the netbook, it support hlsl 2.0 but doesn't support GLSL shaders and only runs GL-1.3
