You can go, there should not be problems.

Yes, if the rule of the main country of the Schengen agreement is observed.

So according to the rules of the Schengen legislation, a visa must be requested from the representative office of the country that will be the main host country, that is, where the most time will be spent. In the case of traveling in succession to several countries, the documents should be submitted to the representative office of the state through which the entry into the Schengen zone will be made.

According to the rules, the main host country is a country where for the period of the visa's validity you will stay longer (including in total) than in any other Schengen country, or where more entrances will result.

However, in the "rule of first entry" of the Schengen agreement, it is only about the same terms of stay in several countries. In general, the country of "opening" a visa does not matter much: for the same multivisa it is more important to which country you travel the most.