If you're specifically looking for mana after bouncing a creature (via Treasure token or whatever), there's Depths of Desire.

If you want any benefit in general, there's stuff like Fading Hope, Brazen Borrower (you get the creature on adventure), Baral's Expertise, Absorb Identity, etc. Just search Scryfall for cards with "return" and "creature" in their text.

For a kitchen table deck you usually just want some way to remove opposing creatures. Path to Exile was the classic Modern staple for , nowadays people usually prefer stuff like Prismatic Ending or Solitude but Path is still good.

Unfortunately, angels are not a very competitive Modern tribe since they're usually big inefficient creatures, and the more efficient angels are probably out of your budget range, e.g. Resplendent Angel. But for casual play this doesn't really matter, just try to focus on creatures that do something useful (draw a card, gain life, etc) while also having decent offensive stats, and maximize your copies of them. So for example, Inspiring Overseer isn't too bad since it's a 2 power flier while gaining 1 life and replacing itself, so 4 copies of it is probably a good idea.

Some quick pointers:

• If your budget is €20, don't bother with multiple colors. Stick to mono , that will relieve all budget pressure on your manabase. You could even run a few utility lands like Seraph Sanctuary without much trouble if you stuck to mono .
• Keep your deck to 60 cards. Consistency is the name of the game, fewer cards in deck = more chances to see cards you want to see.
• Try to figure out what your best cards are and run 4x copies of them. A lot of random one-ofs is generally not great, again consistency is key, you want to see your best cards as often as possible.
• For a casual kitchen table deck I'd probably go for 4x interaction spells (I think you can get Path to Exile for less than < €1 right now) and the rest creatures and lands. Wouldn't bother with those random enchantments or sorceries, they dilute your gameplan of beating face while gaining lots of life.

Best of luck with the deck!