There are some other threads with a lot more discussion and ideas for how beginners can help ID, but in brief: no, you don’t need to be an expert. If you are an active observer in your area, there are probably a few species that you know well and can help with. You also don’t have to provide species-level IDs to be useful. Lots of observations get entered with no ID or only with broad IDs. If you can refine these IDs – say, from kingdom to order or order to family – you will be helping the observations get seen by experts.
Since it appears you are interested in arthropods, a note here that many arthropod groups are difficult and it is a good idea to be cautious when making IDs (i.e., do consult resources; don’t just pick CV suggestions that “look right”; if in doubt, choose a broader ID). It looks like you already do this when IDing your own observations, so you are probably good to go, but every so often someone will start enthusiastically IDing observations of a difficult group without recognizing the limitations of their knowledge and this tends to turn into a very unhappy situation both for the well-meaning user who is trying to help and for the taxon specialists who are faced with a flood of questionable IDs.