Iv'e just grown a Critical Mass and Femaleseeds White widow for my first grow with no problems.
The Mass is harder to get hold off in seed form.
White widow or Northern Lights are great smokes and very forgiving plants.
Bagseed is good for learning but you can get the above feminised seeds in pkt's of 5 for £18.
Nice and easy to start with and you know your plant is a lady
Great way to learn to grow,Top idea doing the 5 packs i reckon
People say to watch for hermies but as long as you dont stress them too much and have a lightproof flowering space you should be able to get some nice bud from your first grow.
You could get regular seeds of the strains but will then have to sex them.
I'd keep it simple and get some female seeds to learn with.
If you can get some rootriot cubes use them to put your cracked seeds in.They are Amazing
Hope this helps and the best of luck with your new adventure,
Enjoy your grow
G.A.T.I