I’m not really sure what you want to know, but here are a few things:
Ash Wednesday is the beginning of Lent. We put ashes on our head to remind us that our bodies shall, in time, turn to dust. The things of this world will disappear, but our soul will remain forever. It is a reminder to spend time nurturing your soul.
Lent is a time to spend time growing closer to God. Most people in religions (Catholic and Protestant) who honor this season try to pray more and/or give a little more to those less fortunate. Hopefully, whatever you do will continue in some form throughout the rest of the year.
Catholics especially tend to find some kind of “mortification”. Mortification used to scare me until I read The Story of a Soul. Mortification is simply denying yourself something that is not in itself sinful (like giving up candy, soda, tv, the remote control, the bigger piece of lasagna) in order to foster self-discipline and to draw closer to Christ who willingly gave up His life for us.
Lent is a solemn time, but solemn does not mean the absence of joy. There is joy in doing any kind of Lenten practice for love of God. There is joy in looking forward to the Resurrection. There is joy in drawing close to the one who is Love and who fills your heart.
Hope that helps.