Imho, the best is to start with en.wikipedia.org/wiki/Hinduism
It's a comprehensive introduction and suggests further resources.

hinduism.iskcon.org/
is well structured and covers a lot of aspects in an easy to read way.

Hope this helps. Hare Krsna
Your servant, bh. Jan

www.vrindavan-dham.com
www.veda.harekrsna.cz

dvaitaM bandhAya mokSAt prAk prApte bodhe manISayA
bhaktyarthaM kalpitam dvaitaM advaitAd api sundaram

"Duality is bondage before moksa and wisdom after realization. The duality accepted for the purpose of bhakti is sweeter than even non-duality." (from mangalacarana to Advaitasiddhi sara sangraha by Madhusudana Sarasvati, former advaitin)

Read the Gita and the Upanishads to start. (or selections of the Upanishads, there are many but there are several great translations of the main ones)

Also learn about what the rituals mean in case you go to a temple.

What sect of Hinduism does your husband belong to?

Maya