Unfortunately all sources are overloaded with extreme simplification where Ukraine is angel and Russia is evil. It's tempting to believe in, although it's very far from truth.
Perhaps the only way to understand reasons and way of thinking each side has - listen to what Russia is saying over course of years, read about atrocities ukrainian army and nazi-style battalions did in eastern Ukraine for last 8 years. Read about nazi-style military camps growing in Ukraine last years.
All those things are rarely getting light in media. Putting a crying girl and "fuck you Putin" sells much better than in depth analysis or understanding why Putin did what he did. Hopefully I am wrong, but this kind of ignorance can lead to much much bigger troubles than current ones.
Try to read more of what both sides are saying, but be aware that ukrainian media is propaganda at it's best (would be better to put worst) so whatever they say should be taken with huge grin of salt.