I made a similar card for a CAS challenge a few weeks ago and thought I could spiffy it up a tad.
I really like the quirky little birds as they lend themselves to many interpretations, particularly non-flowery ones!
I simply printed out the sentiments, both for the card base and the interior page, from my computer.
I like doing this as I can size, fontisise (think I may have just made that word up!), and colour the sentiment to suit whatever I am doing. It also frees me to use whatever form of words I prefer, as I find my sentiment stamps are very limiting, seemingly however many I purchased in the past...
The trick is to get the sentiment placed correctly on the cardstock, and, if using paper with a design (like the spotted interior page), have it print straight.
All my printers, and I have 3 in constant use, one on standby, have a gremlin ability to slightly offset the paper, only sometimes mind, as when the fancy takes them...or when you have added the only remaining sheet of your preferred design...or when you are in a steaming hurry...but today none of those issues were in play and all the stars aligned.
Close examination of the images indicates a good outcome! The card base is usually less critical as the card can always be trimmed slightly to accommodate any slight discrepancy, if required.