The strings tension is fixed, after you tuned a set of strings, it's suppose to maintain the same tension, thats where you get your music note from.
Maybe what you are asking is how to get a more comfortable feel, which could be due to the action of the string (height between string and fret).
One way, get your guitar proper setup. Poor setup guitars are difficult to play on. Bring to a guitar shop for that.
Change type/brand of strings, different brands does give a little difference in feeling. Note you could sacrifice tone for comfort.
Change your guitar, some guitar have necks which are very easy to play on.