This can be done today ... but also as often as you can fit it in!
Having beautifully neat, joined and correctly formed (and sized) letters is a target for Year 3.
Below are a series of resources to use, ranging from individual letter formation through to a 36 page cursive writing pack. You do not have to print them all out, rather dip in and out as needed to practice, so it is well worth downloading some of them for regular use.
You can either choose to print off specific pages to practice or copy the word and letter formation straight from the screen.
The more you practice, the better your presentation will get!